Thursday, March 4, 2021

ARUBA 9000 SERIES GATEWAYS

Aruba 9000 Series Gateways provide high-performance

networking, SD-WAN and security functionality in compact

and cost-effective form factors. Ideally suited for branch and

small campus networks, the 9000 Series Gateways serve a

key role within Aruba’s SD-Branch solution, which unifies

WLAN, LAN, SD-WAN and security for distributed enterprises.

The 9000 Series can be easily configured and managed using

Aruba Central, a cloud-based network operations, assurance

and security platform. Onsite deployment is accomplished

with a simple mobile installer application.


HIGH PERFORMANCE AND RELIABILITY

For distributed enterprises with increasing performance and

bandwidth needs, the 9000 Series is designed with scale

and flexibility, and equipped with plenty of horsepower at a

competitive price-point.

The 9000 Series provides connectivity for up to 2,048 users

or client devices at up to 6 Gbps of firewall throughput. These

capabilities are up to 80 times the client density and 10 times

the maximum throughput of typical SD-WAN appliances.

For enhanced resiliency and high availability, the multiple

9000 Series can be clustered together at each branch.


IOT AND INTEGRATION READY

The 9000 Series includes flexible connectivity options:

• 4xGbE – 9004

• 12xGbE (6xPoE+) – 9012

• USB 3.0 ports

• IoT Radio that supports BLE technologies

• Integrated LTE connectivity – 9004-LTE

The gateway also uses integrated device profiling to

improve client visibility, and works with Aruba Central,

ClearPass Policy Manager or ClearPass Device Insight to

provide advanced user, device and IoT policy management

and insights.


ARUBA 9000 SERIES GATEWAYS: ACDX

Versatile, cost-effective branch networking, SD‑WAN, and security


SD-WAN DEPLOYMENT

For organizations that are now managing multiple WAN

connections, 9000 Series Gateways can be connected to

Aruba’s SD-WAN fabric right out of the box. SD-WAN is a

rich WAN management solution that is used to simplify

management of traffic entering and exiting branch

sites. Role-based intrusion detection and prevention

(IDS/IPS), Dynamic Segmentation, and stateful firewall

deliver integrated security requirements. Please refer to the

SD-WAN datasheet for more information.


BRANCH AND CAMPUS DEPLOYMENT

9000 Series Gateways can also be re-purposed as Mobility

Controllers to provide WLAN and LAN services such as

Dynamic Segmentation, stateful firewall and Live Upgrades.

In this mode, the 9000 Series cannot simultaneously be

used for SD-WAN. For more information, refer to the

ArubaOS datasheet.

Wednesday, March 3, 2021

Google Dark Fiber Plans Long-Term Trends, Hires Fiber Optic Lines from Other Networks

Google could expand its fiber offerings around the United States, after announcing that it will bring online various "dark fiber" networks that have remained dormant for too long. Although it will be limited to certain areas of certain cities, Google will soon make it much easier for people to access ultra-fast internet connections ready fiber.

The dark fibers are not quite similar to those of the dark blanket, so don't imagine an underground network of millions of spaghetti fiber optic cables, all wrapped together like a king tech rat. The dark fiber is more like the child forgotten by the high-speed era. It is a cable that was laid by companies in the hope that someone will pay them to use it in the future.

How much there is an unused fiber optic cable depends a lot on the state and city authorities, because some have seen the fibers much more important for the future of their premises than others. San Francisco is a city with a lot of unused cables, so all Google has to do is install connections from local hubs to individual buildings and it's off and running.

Other cities that expect to benefit from the use of existing, unused infrastructure include Salt Lake City, San Atonio, Nashville, Huntsville and Charlotte, among others.

Unfortunately, to save costs, Google only plans to wire buildings where multiple companies or families can purchase fiber connections. But if all goes well, it won't be long before the same package is offered to individual homes.

One of the most interesting aspects of this ad, as the motherboard pointed out, is that Google is using someone else's network. Existing US telecommunications companies do not do this often because they would prefer to control the entire connection, but Google is happy to break with tradition to increase the availability of fiber it seems.

This practice is much more common in other countries. In the United Kingdom, British Telecom (BT) and TalkTalk regularly lease the use of their lines to competing ISPs, and indeed, until recently, BT was the sole line operator throughout the country.

It will be interesting to see if Google sets a precedent and we will see more companies that will fall on this path in the future.

Tuesday, March 2, 2021

THE F5 CODE: WE EMPOWER YOU TO DO GREAT THINGS

Code is at the heart of our DNA; it’s what makes us human. And it’s at the core of our company DNA: it informs our code of ethics, guides how we work together and help our communities thrive, and drives how our product development teams innovate.

Code also brings applications to life—applications that change the world. You use these apps every day—and not just on your smartphone. Imagine life without online shopping, cloud storage, or other web-based services that we currently take for granted. F5 creates products and services that the world’s leading retailers, banks, securities firms, telecom operators, insurance companies, automotive manufacturers, and 48 of the Fortune 50 rely on to deliver their services faster and with the highest levels of flexibility, security, performance, and support.

This is a once-in-a-lifetime opportunity to become part of a company that’s on the leading edge of transformation. We believe code—our human code and our digital code—opens doors. And because we know that a more diverse F5 is a more powerful F5, we’re looking for smart, talented, determined individuals to join us. If you make thoughtful decisions quickly, obsess over your customers’ needs, take ownership of your work (the mistakes as well as the successes), and embrace different perspectives by putting the human first, then we want to talk to you.

Our Culture Supports Your Whole Life

Our success isn’t driven solely by what we do. We also care deeply about how we do it. At F5, our culture is how we live, every single day. And it’s producing extraordinary results—not only for our customers, but also for our employees. We understand that your life is about more than just work, so we’re committed to a culture that supports your whole life. We offer work/life integration programs like Freedom to Flex, dynamic employee inclusion groups, paid maternity/paternity leave, tuition assistance for professional development, a comprehensive mentoring program, rewards/recognition, and so much more. At F5, we truly do help each other thrive and it shows: F5 has been named one of the “World’s Most Admired Companies” by Fortune magazine for the past two years in a row.

F5 is committed to being a force for social good.

This commitment to living our culture doesn’t just exist within our offices; it extends into our communities as well. The F5 Global Good program, which includes grants from the F5 Foundation, expands the culture of “doing good” that F5ers have nurtured over the past two decades, allowing us to extend our reach in three focus areas: f5 networks careers

Community: Supporting charitable causes that our employees feel most passionately about, especially those in the communities where we live and work.

STEM education: Enabling girls, women, minorities, and other underrepresented groups to develop STEM skills by connecting them to global educational and employment opportunities.

Tech for Good: Assisting nonprofit organizations with their digital transformation efforts so they can do even more to help those they serve. 


WE’VE REDEFINED RESPONSIBILITY.

We Bring an Owner’s Mindset to Everything We Do, Every Day

Do you thrive in an environment where you’re empowered to make thoughtful decisions quickly? Where you’re encouraged to try new things, learn from your mistakes, iterate, and move forward? Where you’re expected to find ways to cut out unnecessary red tape? At every level of the organization, we trust you to efficiently seek out the guidance and feedback you need, and then to proceed with speed and intent to turn your ideas into reality.


OUR LEADERS DO THE RIGHT THING EVEN WHEN NOBODY IS LOOKING.

At F5, Anyone Can Be a Leader – Regardless of Title or Role

We believe leadership is a mindset, and that true leaders can be found anywhere across the company. Our leaders are passionately committed to embodying our BeF5 behaviors and embracing our LeadF5 principles, which includes empowering employees to do great things for our customers, uniting our diverse workgroups around shared goals, and continuously pursuing higher levels of performance.

Monday, March 1, 2021

System Administrator Linux SRE Engineer

We are looking for a Linux \ SRE Engineer with extensive experience who will be responsible for all the processes of maintaining the information system.  


What to do: sysadmin salary

Development of a monitoring system based on Prometheus (VictoriaMetrics) and long-term data storage; 

Providing developers with tools for debugging and monitoring - dashboards, logs, traces and alerts; 

Capacity planning and ensuring fault tolerance and high availability of these systems;  

Collecting metrics from all subsystems, writing metrics exporters for Prometheus. 

Current tasks (~ 6 months): 

Build dev / beta / prod outlines within unstructured information; 

Build fault-tolerant balancers with service discovery for non-Kubernetes infrastructure; 

Document the process of creating environments and examine the Ansible role suite; 

Automate routine operations and reduce the amount of sacred knowledge; 

Support existing IaaS private installations. 

What do we expect from a candidate?

Experience in administering a large number of servers, workflow automation, knowledge of Ansible; 

Experience in deploying the CI pipeline on Jenkins and / or GitLab CI; 

Building rpm packages and writing Makefile; 

Knowledge and experience with Kubernetes, Helm - understand how to build helm releases of a whole system. 

Will be a plus:

Experience with virtualization systems Proxmox, Opennebula, oVirt or similar; 

Experience in writing scripts and applications in Python, Bash; 

Understanding the concept of SDN. 

We offer:

Interesting tasks and the opportunity to join a team of professionals;

Official salary, registration according to the Labor Code of the Russian Federation;

VHI with VIP-class clinics, including for children under 18;

Power compensation;

Partial fitness compensation;

Modern technology for work;

Comfortable office;

Flexible work schedule with the ability to shift the start of the working day;

We are considering options with partially remote and remote employment;

Corporate transport from metro Altufevo and Rechnoy Vokzal;

Parking on the territory of the business center;

Relocation package for candidates;

Opportunities for professional growth and development.

Saturday, February 27, 2021

Cisco CCNA, LAN to Wireless Switching

Do you want to work in a cozy office, or maybe even at home? Do all employers require work experience? Do you know who could help you?

Cisco courses are a good chance to prove yourself to future employers.

We have already trained 2,000 IT specialists, 100% of our graduates are employed, 95% of graduates receive international certificates.

If you were expecting a "sign from above", so here it is. Everything depends only on you, we believe in you! For our part, we promise a high level of teaching.

The groups are almost complete, so don't miss this chance! We look forward to seeing you!

Graduation Document: Cisco CCNA Industry Certification.

Program: ccna wireless

This course provides a comprehensive, theoretical and practical approach to learning the technologies and protocols required to design and implement a converged switched network. Students will learn about the hierarchical network design model and how to select devices for each level. The course explains how to configure a switch for basic functionality and how to implement VLAN, VTP, and cross-species routing in a converged network. Various implementations of the Spanning Tree protocol in a converged network are presented, and students develop the knowledge and skills necessary to implement WWLAN in small to medium-sized networks.

Chapter 1. LAN Design

Switched LAN architecture.

Coordination of switches with specific functions of the local network.

Chapter 2. Configuring the Switch

Introduction to local area networks Ethernet / 802.3.

Forwarding Ethernet frames using a switch.

Switch management configuration.

Configuring switch security.

Chapter 3. VLANs

Familiarity with VLAN concepts.

VLAN trunking.

VLAN configuration.

Troubleshooting VLAN

Chapter 4. VTP Implementation

Familiarity with VTP concepts.

VTP operation.

Configuring VTP.

Chapter 5. Implementing Spanning Tree Protocols

Layer 2 redundant topologies.

Configuring VLAN-based Spanning Tree Protocol.

Configuring VLAN-based Fast Spanning Tree Protocol.

Chapter 6. Implementing Inter-VLAN Routing

Inter-VLAN routing view.

Configuring inter-VLAN routing.

Troubleshooting.

Chapter 7. Configuring Your Wireless Router

Wireless LAN topology.

Wireless LAN Security.

Setting up a wireless access point.

Troubleshoot wireless clients.

Thursday, February 25, 2021

Optical Circuits of Fiber-optic Devices

Fiber optics is a branch of optics that studies the physical phenomena that arise and flow in optical fibers, as well as products of the precision engineering industries, which include components based on optical fibers how fiber optics work.

Fiber optic devices include: lasers, amplifiers, multiplexers, demultiplexers, and others. Fiber optic components include: insulators, mirrors, connectors, splitters, and others. The basis of a fiber-optic device is its optical design - a set of fiber-optic components connected in a specific sequence. Optical circuits can be closed or open, with or without feedback.

Optical circuits of fiber-optic devices:

Laser

The figure shows the simplest diagram of a fiber-optic laser, where A is an active fiber, D is a pump diode, and M1 and M2 are mirrors. As in the case of conventional lasers, there is a cavity with an active medium formed by an active fiber and mirrors. Mirrors provide feedback. One of the mirrors can be 100% reflective. Then the radiation will come out only from the opposite end of the resonator. There can be several pump diodes, and they can be located on different sides of the resonator.

Amplifier

The figure shows the simplest diagram of a fiber optic amplifier. It is similar to that of a laser except that the mirrors are replaced with insulators to suppress feedback. Insulators only allow light to pass in one direction.

Fiber Optic Component Arrangement:

Mirrors and filters

A mirror is a component that reflects radiation of a certain frequency with a certain reflection coefficient. The filter, in turn, transmits radiation of a certain frequency, usually in a narrow frequency range, and absorbs or scatters the rest of the radiation. For the manufacture of mirrors and filters, diffraction gratings are used, deposited on a section of the fiber core. The analogue of the stroke is performed by ultraviolet illumination, which changes the properties of the fiber at the place of irradiation. One and the same diffraction grating for different signal frequencies will be either a mirror or a filter.

Insulators

Insulators allow radiation to pass in only one direction. In electricity, their analogue is diodes. Optical isolators operate on the Faraday effect and are not fully fiber optic. The working area of ​​the insulator consists of two polarizers and a Faraday cell (a magnet with a special crystal embedded in it). In the cavity of the magnet, and therefore in the crystal, a magnetic field is created, which rotates the polarization of the transmitted radiation by 45 degrees. The axes of the polarizers are also rotated at an angle of 45 degrees relative to each other. Due to this, radiation in one direction passes unhindered (and at the same time becomes linearly polarized), and does not pass in the other direction, because delayed by the output polarizer. The input and output of the insulator are made in the form of sections of optical fiber, so that this component can be used in optical circuits. To improve the characteristics of the insulator, lenses are placed after exiting the fiber and before entering another fiber, which make the beam parallel, which significantly reduces losses.

Connectors & Splitters

They are two parallel fibers, devoid of a shell and in contact with each other. Fiber contact and fixation is achieved at high temperatures - above the fiber melting point. Thus, the fiber sections are fused together. Depending on the length of the common section, as a result of wave interference, an arbitrary division ratio of the output signal can be obtained over the two output fibers.

Active fiber

A fiber capable of amplifying or generating a signal of a specific frequency. This is achieved by introducing rare-earth impurities into the silica fiber, depending on the required amplification frequency. Thus, ytterbium (Yb) impurities give amplification at wavelengths of 1.06 and 1.3 µm, and erbium (Er) impurities at a wavelength of 1.5 µm. The gain peak is determined by the transparency peak of a particular impurity.

Passive fiber

Non-reinforcing fiber. It is used to connect fiber-optic components to each other, as well as to increase the total length of the optical circuit, if necessary.

Pump diodes

As in the case of conventional lasers, pumping of the active medium is required to start amplification and generation. Semiconductor laser diodes are used to pump active fibers. At the exit from the semiconductor crystal, the laser beam is collimated and introduced into the fiber. The choice of the wavelength of the pump diodes is due to the absorption peaks of active fibers, which fall in narrow ranges in the regions of 0.81 mm, 0.98 mm, and 1.48 mm. For ytterbium fibers, pumping is most efficient in the range 0.95-0.98 mm. By looking at the ratio of pump and signal wavelengths, one can determine the maximum possible efficiency of lasers and amplifiers. For ytterbium fibers, it will be 0.95: 1.06 = 90%. In practice, the efficiency is of course lower.

Non-linear effects in optical fibers

2nd harmonic generation

With sufficient radiation power in the optical fiber, the radiation frequency is doubled. For example, in ytterbium fibers operating at a wavelength of 1.06 μm, the second harmonic generation leads to the appearance of radiation with a wavelength of 0.53 μm. This radiation is in the visible range and is an emerald green light.

Fiber Optic Applications

Optical fibers can be used for medical purposes, for example, inserting a camera into a patient's body to transmit an image of an organ or lesion to an external television camera, which eliminates the need for examination using surgery. In automobiles, they are used to supply light from a common source to various dashboards. Optical fibers link computers, robots, television sets, and telephones in many factories and offices.


 

Wednesday, February 24, 2021

Transforming Day 2 Operations with Cisco Data Center Network Assurance and Insights

The challenge of operating a data center has never been greater. But the opportunities have never been larger. Today, data-driven businesses (which is to say, most businesses) are changing rapidly to stay competitive. There are more applications than ever, and more different classes of people and machines using the applications. And there’s constant change in the shape of business infrastructures, as data “centers” become less centralized thanks to edge and cloud-based storage and compute resources.

The opportunity for us in IT is to enable these changes. When we do this well, IT is in strategic partnership with business. Being flexible and responsive to business means that strategic planners will find encouragement for their plans in the technology core where we work, which makes IT leaders copilots in business growth ccie data center salary.

But the only way for IT to offer this level of service is to have deep understanding of what the data center is doing, how everyone and everything is using it, how it is responding to the demands on it, and most importantly, how it will respond to new loads that arise due to new business processes.

Intent-based networking helps network operators get ahead, instead of playing catch-up.

Most of these capabilities are part of running a network, what is now often called Day 2 Operations. (For the record, Day 0 is design and procurement; Day 1 is installing, provisioning, segmenting – getting it running.)

To make Day 2 Ops easier for our customers, we’re happy to announce today that Cisco is expanding its Data Center Network Assurance and Insights suite to include new Network Insights capabilities. This portfolio of software analytics capabilities for existing Cisco data center installations — whether they’re based on DCNM or ACI – can analyze every component of a data center to first, assure business intent; second, guarantee reliability; and finally, identify performance issues in a network before they happen.

These new capabilities enable people in IT operations to do their jobs more easily, and in the process, add value to the data center and the business itself. It is part of our drive to bring intent-based networking to our customers, so they can spend more time thinking about what they want their installations to do, and less time worrying about how they will do it.

The Latest Tools

To keep a network running smoothly, we are adding service reliability functions to Network Insights. New features  will gather system-level wide data from every Cisco switch in the fabric, detect anomalies before they impact applications, and notify operators of these issues before they affect the integrity of  network services. Network Insights can also provide proactive upgrade advice for devices across the fabric.

If a problem should arise, our intelligent analytics capability will identify the root cause, using real-time flow telemetry from devices in the fabric. This feature monitors application patterns, latency data, packet drops, and other metrics to allow for fast correlation between infrastructure status and actual network traffic.

We are adding more assurance capabilities as well. The new change verification feature allows operators to understand the impacts of changes by modeling them before they are implemented in the fabric.

With all these new capabilities, we will provide a common solution, one that works across ACI and NX-OS, as we  transform Day 2 Operations from reactive to proactive.

Tuesday, February 23, 2021

The systems analyst works

Job specification: systems analyst

The successful candidate should have strong analytical thinking and problem solving skills in addition to being an effective communicator. 

He must have extensive knowledge and experience with hardware and software, including their installation, maintenance and lifecycles.  

Employers normally require a minimum of a bachelor's degree in information systems, computer science, or a related field, along with at least five years of experience with specific applications or operating systems. 

The systems analyst works under the direction of an operations manager and provides the interface between the design and operations teams. Its mission is to ensure the proper functioning of a computer system. Formerly limited to the daily management of servers, its role has now broadened with the security and migration aspects of these. The system analyst is therefore more called a system administrator. Its objectives are also oriented towards the search for the automation of operating processes and the improvement of productivity. The System Analyst / System Administrator profile is highly sought after by service providers.

Main missions

Depending on the experience and skills of the Web integrator, and depending on the characteristics of the company, his responsibilities may be extended



Monday, February 22, 2021

IT Expert Training Center has successfully passed the PeopleCert audit

The IT Expert Training Center at the end of last year successfully passed the annual audit of the PeopleCert International Examination Institute .

An audit is an annual partnership with PeopleCert that includes the following key areas: aws certified solutions architect

organizational structure and human resources of the company;

infrastructure;

development of training course programs;

management of learning;

organization of examination work;

Quality Management System;

The purpose of the audit is to check compliance with the AXELOS accreditation rules, assess the effectiveness and quality of services provided, help find opportunities for improvement, and share best practices.

The IT Expert training center has once again confirmed the status of an accredited training organization, which allows you to be confident in the quality of training with us. We don't read smart books out loud to you. In our courses, we work with you - our audience - to work together to help you solve your problems and create for you the value for which you came to study.

Friday, February 19, 2021

What is a data center

What makes a modern data center different?

Today's data centers are fundamentally different from those in use more recently. Instead of standard on-premises physical servers, the infrastructure uses virtual networks that distribute applications and workloads across physical infrastructure and a multi-cloud environment.

Today, data exists and interacts across multiple data centers, at the network perimeter, in private and public clouds. The data center must support the exchange of data across all of these sites, both on-site and in the cloud. Even the public cloud is a collection of data centers. When applications are hosted in the cloud, they use data center resources from the cloud provider.


Why are data centers important to business?

In an enterprise IT infrastructure, data centers support business applications and processes, including the following: ccna data center

Email and file sharing

Productivity apps

Customer Relationship Management (CRM)

Enterprise resource planning (ERP) and databases

Big data, artificial intelligence and machine learning

Virtual desktop, communication and collaboration services

Main components of a data center

The data center structure uses routers, switches, firewalls, storage systems, servers, and application granting controllers. Because these components store and control business-critical data and applications, the security of the data center is critical to its design. This ensures:

Network infrastructure. It provides connectivity to servers (physical and virtual), data centers, storage, and external connectivity for end-user objects.

Storage infrastructure. At the heart of a modern data center is data. Storage systems are used to house this valuable resource.

Computing resources. Applications are data center engines. These servers provide processing, memory, local storage, network connectivity, which is what applications need to run.

How do data centers work?

Typically, data center deployments are performed to ensure the efficient operation and integrity of the main components of the data center.

Network protection devices. This category includes firewall and intrusion protection, which are responsible for securing the data center.

Providing access to applications. To maintain application performance, these mechanisms provide fault tolerance and availability of applications through automatic failover and load balancing.

What is a data center object?

Data center components require a large infrastructure to support the center's hardware and software. This infrastructure includes power subsystems, uninterruptible power supplies (UPS), ventilation, cooling and fire extinguishing systems, standby generators, and external grid connections.

Data Center Infrastructure Standards

The most widely used standard for designing data centers and their infrastructure is ANSI / TIA-942. It includes standards for certification ANSI / TIA-942, which ensures compliance with one of four data center tier categories that differ in terms of redundancy and resiliency.

Level 1: basic infrastructure of the facility.  A Tier 1 data center provides limited physical protection. It uses single-capacity components and a single distribution path without redundancy. 

Level 2: Facility infrastructure with spare capacity component.  This level of data center provides enhanced protection against physical attacks. It uses spare capacity components and a single, non-redundant distribution path. 

Level 3: parallel serviced facility infrastructure. This datacenter protects against virtually all physical impacts, provides components with redundant capacity and multiple independent distribution paths. Each component can be removed or replaced without disabling the end-user service. 

Level 4: Resilient Facility Infrastructure. Such a data center is distinguished by the highest rates of fault tolerance and redundancy. With redundant capacity components and multiple independent distribution paths, concurrent maintenance and troubleshooting can be performed anywhere in the infrastructure with no downtime.

Thursday, February 18, 2021

Cisco Routing and Switching certifications

Obtaining certifications of specialists in Routing and Switching. Routing and Switching

The certification program provides for several levels of specialist competence: 

CCENT - entry level;

CCNA - basic level;

CCNP - Professional Level;

CCIE Routing & Switching - Expert.

CCENT (Cisco Certified Entry Networking Technician) certification

CCENT certification is the entry-level proof of initial networking knowledge. The level of qualification of a CCENT specialist is sufficient to configure, maintain and provide security for networks of about a dozen users.

CCNA (Cisco Certified Network Associate) certification

Cisco CCNA (Cisco Certified Network Associate) certification is the foundation for improving the professional training of engineering staff involved in networking.

CCNA -certified professionals are certified to install, configure and maintain network devices on networks of up to 100 devices, with deep knowledge and sustainable skills in the following areas:

Local area networks (LAN)

Wide area (WAN) networks, connections with Internet providers

WiFi wireless networks

Remote access services

Providing basic security for the network infrastructure

Virtual private networks

Troubleshooting Networks

Cisco Certified Network Associate certification

100-105 ICND1200-105 ICND2

CCNP level network security product / technology specialists.

The CCNP Security curriculum includes multiple certifications in network security engineering for collaborative training and professional development. Designed for individuals who specialize in one or more technologies or products that secure network infrastructure, these security professional certifications offer a convenient way to validate skills and competence for solutions in various areas of network security: intrusion prevention, virtual private networks, firewalls, access , 802.1X, Mobility Access, Network Access Control (NAC), and security features supported by the latest Cisco switches and routers. The following specialist certifications are included in the Cisco Network Security Specialist curriculum:

CCNP (Cisco Certified Network Professional) certification

The status of Cisco Certified Network Professional (CCNP) enables those who receive it to plan, implement, support and troubleshoot problems in local and global corporate networks and work together towards security, implementation of voice, wireless and video solutions.

CCNP certification is designed for candidates with at least one year of networking experience who are willing to develop their skills and work independently with complex networking solutions. CCNP certified holders have demonstrated the skills required for corporate professionals such as network technicians, support engineers, system and network engineers.

Cisco Certified Network Associate certification

Cisco Professional Level certifications are valid for three years and Professional Level certifications are valid for 2 years. Certification holders must pass any of the 642-xxx exams that are part of the professional-level security professional curriculum or any of the Cisco CCIE or Cisco CCDE line of written exam or current CCDE practice exam or Cisco Certified Architect (CCAr) interview before expiration validity period of certification.

Wednesday, February 17, 2021

Voice VLAN – Auxiliary VLAN

The terms Voice VLAN or Auxiliary VLAN typically mean the same thing: They are a feature which allows an access port — which normally only accepts untagged traffic for a single VLAN — to also accept tagged traffic for a second VLAN.

But that is merely the “what”, and if you were simply looking for a definition, then the above is all you need voice jobs.

However, in order to really understand the concept, we have to look at the “why”, and also a bit of the history which brought about the Auxiliary VLAN. Doing so will reveal the use cases for the Voice VLAN or Auxiliary VLAN, as well as a particular use case for the Native VLAN.

Before we get into the details, it is important to have a solid understanding of VLANs. Namely the purpose of VLANs, Access Ports, Trunk Ports, the Native VLAN, the configuration of VLANs, and the concept of a Converged Network. If these concepts are not familiar to you, start by reading the articles and videos which explain them.

Also, the terms themselves are generally interchangeable. Voice VLAN is more often used in the Cisco context because of the command used to configure it, while Auxiliary VLAN is typically the name of the feature itself.

Voice VLAN Functionality

Imagine office cubicles. Imagine each cubicle contains a desk and a computer which an employee uses to connect to your corporate network.

Voice VLAN – Auxiliary VLAN – Office Cubicles

When this office floor was being built, network cables were ran through the walls and ceilings from each position on the cubicle floor to the network closet where the access switch for the corporate network exists.

These cable runs are sometimes called “LAN drops” – a place an employee can connect locally (from their cubicle) into the corporate network switch (behind lock and key in the network cabinet).

You end up with a topology that looks something like this (image not drawn to scale):

Voice VLAN – Auxiliary VLAN – Desks before VOIP Phones

Traditionally, there was one LAN drop for each cubicle.

This was sufficient when employees only had one PC or Laptop to connect to the network. They would simply plug in locally at the cubicle, and the wall jack would lead back to the corporate network switch.

The switchport would be configured as an access port in the VLAN associated with that employee’s role. The PC sends untagged data traffic, and the switch associates that traffic with the Data VLAN. On a Cisco switch, the configuration would resemble something like the following:

Switch(config)# vlan 22

Switch(config-vlan)# name DATA

Switch(config)# interface ethernet0/0

Switch(config-if)# switchport mode access

Switch(config-if)# switchport access vlan 22

It is worth highlighting that (typically) PCs always send untagged traffic – this point will be important shortly.

As time went on, phones which could carry Voice traffic over the IP network (VOIP phones) started being developed. Which leaves us with a problem — if a VOIP phone is added to each desk, where could you plug it in to get access to the corporate network? There is only one available wall jack and it is already in use by the PC.

Tuesday, February 16, 2021

The engineering consulting company

An engineering consulting company supports professionals who work in various sectors to help them carry out specific and large-scale projects. Its know-how is often called upon when its sponsors are faced with complex and difficult situations to resolve.

Whether he works as a freelance or not, the engineering consultant is able to intervene in various fields: Engineering Freelance

Industry;

New information and communication technologies;

Research and development ;

Finance.

Start your business online

What is an engineering consulting company?

You should turn to the engineering consulting firm when you want to solve delicate and complex problems relating to a large project . His intervention can be requested throughout the stages of the latter.

Definition

To better understand the scope of the missions assigned to this type of company, it is necessary to define what engineering is. It designates the equipment, infrastructures, works and products whose design and implementation require a thorough technical study.

The skills to which companies are moving to meet these needs are generally those of a consulting firm specializing in engineering. The scope of its roles may vary depending on:

The type of project;

Her size ;

Its complexity;

The industry to which it applies.

Role of society

A company whose main activity is oriented towards engineering and consulting employs a diversity of skills. Its attributions may vary according to the specifications of its sponsor . It can be a:

Informatic project ;

Problem related to the design of an automobile model;

Other technical aspects to be resolved.

In all cases, an engineering consulting company brings its expertise in:

Technical support and decision-making advice (market detection, planning of project tools, feasibility study);

Design and implementation of an industrial or research project;

Management of a project throughout its stages of development.

Monday, February 15, 2021

Engineering and Science: Engineering is not scientific

Engineering and Science

Systems engineering thinking and activity - how can we describe them ?! After all, you cannot touch them, you cannot clearly demonstrate them. If you try to observe what an engineer is doing, he sits quietly in a chair and clicks the mouse buttons from time to time. Or he stands calmly and looks at devices of complex installation, sometimes turns some knobs and presses some buttons. And at the same time, it is clear that his thinking and activity are different from the thinking and activity of a pianist, who also sits calmly on a chair and clicks the buttons of the piano from time to time.

Our book is about ways of thinking and ways of acting. First, we need to find ways in which we will describe thinking and action.

Engineering is changing reality - moving mountains, creating matches and lighters, building Mars rovers and Da Vinci's medical robots. The space-time of the physical world was arranged in one way, engineers came, space-time was arranged differently.

Science is engaged in the production of compact descriptions of reality - it comes up with Feynman diagrams, theories of thinking, the concept of system and activity. Space-time was thought to be arranged in one way, scientists came, space-time now think that it is arranged in a different way.

Teaching science is teaching how to build compact and understandable descriptions of how the world works. For example, 4 Maxwell's equations describe all the electromagnetic phenomena in the world, and the Schrödinger equation describes the wave functions of elementary particles. Whether it is possible to “learn to be a scientist” is a separate question, we will not consider it here.


Engineering is not scientific

The difference between engineers and scientists Engineers and scientists

should not be confused. Scientists are exactly the opposite of engineers: if engineers do real material things based on thought, then scientists make thoughts out of reality - they get compact, understandable and formal descriptions of reality. Of course, engineering and research are closely related:

● when an engineer receives an engineering object, the behavior of which does not correspond to his design, he investigates the problem: he tries to find the most compact description of the operation of this engineering system, from which it would be clear where he was mistaken in the design and its incarnation. Then he corrects the error: changes the system.

● when a scientist comes up with a new way of describing, more compact and better explaining the world than the previous methods, he conducts experiments. Not all experiments are "mental". Some of them require the creation of very, very complex engineering objects (for example, accelerators are one of the most complex engineering objects on Earth). When an experiment is done, scientists adjust their theories based on the results of the experiment.

Thus, engineering and research activities are linked in a cycle, and each research or engineering project usually has to repeat the cycle many times: what is IT

The main thing here is the goal of the encompassing activity, and not the actual work of “research” or “development” (“science” or “engineering”): the goal is either the emergence of some material system that benefits users, or the emergence of some kind of compact description / explanations of how the world works. In any case, either engineering is hidden in research, or research is hidden in engineering.

This confusion, reflecting the connection between engineering and science, is quite common:

● In most cartoons, a “scientist” in a white coat is least of all a scientist, it is an “engineer-inventor”. These supposedly "scientists" do not set up experiments: they come up with some systems necessary for their purposes, and embody these systems in reality. These are "Edison laboratories".

● “Applied science” (applied research) is also the least science, despite the word “research”. It is not necessary to expect any "theories" from this science, and the results of R&D (scientific and experimental-design developments), as a rule, are quite engineering objects, and not methods of description. Their only difference with the results of classical engineering development is that the result is a prototype or prototype, and not a consumer product (between a “working prototype” and a “released product” there can be years and years of development, development - and the result is not “Inventions”, and “innovations”, defined as inventions successfully brought to the market).

● Very often, applied research and classical development are not separated at all, hence the steady decline in R&D (research and development). Is there a difference? There is: "Edison's laboratory" (Bell Labs laboratory, IBM laboratory, etc.) still differ significantly in the organization of work and the work carried out in them from the classical engineering development. But they don't differ fundamentally! Technology and innovation management deals with R&D management.

Real science is "basic research" that is done in "Einstein's laboratories." The output is not “prototypes” (inventions, “inventions”, prototypes of systems and ideas for these prototypes), but theories - compact and formal descriptions of nature. Unlike R&D, management and funding of science occurs in a completely different way, often they occur outside the framework of enterprises altogether.

Systems engineering is also engineering, not science. Systems engineering may well include R&D, inventions, prototyping.

Another connection between science and engineering is the design of experimental installations, to some extent the creation of engineering prototypes can be attributed to scientific research (although this may not be about confirming a scientific theory, but confirming some kind of guess or noticed heuristic).

If we want to create a formal, compact description of systems engineering itself, then it is a science, “engineering science”.

Friday, February 12, 2021

Mechanical Engineering vs. Software Development

What is mechanical engineering?

Mechanical engineering is one of the oldest and most diverse engineering disciplines. It is a branch of mechanical engineering that includes the design, manufacture and operation of machinery through the application of physics , engineering, mathematics, and materials science.

Mechanical engineering occurs in fields such as composites, mechatronics and nanotechnology, and often overlaps with manufacturing, metallurgy, civil engineering , aerospace engineering , electrical engineering , chemical engineering, industrial engineering, and other engineering disciplines to varying degrees software engineer salary.

Technically, mechanical engineering is the application of engineering concepts and problem-solving techniques to any product, from design to manufacturing to market. Mechanical engineers evaluate their work using the concepts of motion, energy, and force - ensuring that structures operate reliably, efficiently and reliably at all costs.


How to become a mechanical engineer?

Becoming a mechanical engineer in Arizona is not that difficult, you need to take the following steps:

Get a Bachelor's Degree in Mechanical Engineering

BLS notes that most entry-level jobs in the industry require  a bachelor's degree  in mechanical engineering. Students can also opt for a two-year study as an Engineer-Engineer and consider the related job as a mechanical drafter. Thereafter, they can transfer to a four-year school to fulfill the remaining requirements for a bachelor's degree.

The undergraduate course includes moderate and advanced  m in mathematics , science and physics, engineering and design. Students will also be in a computer lab, working with advanced computer-aided design (CAD) software.

The program offers courses that prepare students for specialization in one or more engineering sectors. For example, coursework in medical engineering technology focuses less on theory than on the practical use of design principles. Engineering internships and cooperatives are often part of the educational program.


EARN AN ENGINEERING LICENSE

In the United States, all mechanical engineers who provide services directly to the public must be licensed by the government. However, students can apply for a license from an ABET-accredited engineering program after completing  a bachelor's degree  in mechanical engineering. In addition, engineering graduates must pass the Fundamentals of Engineering (FE) exam provided by the National Board of Engineering and Geodetic Examiners to qualify.

After four years of active service, engineers can pass the Design Principles and Practice (PE) exam to become Professional Engineers (PE).

Employers can comply with licenses from other states, given that the original licensing requirements are equal to or greater than those in the new state.

Thursday, February 11, 2021

Which professions pay the most?

What is the list of the trades that pay the best? This question is not easy to answer because the data is scarce and scattered. We must successively focus on private sector employees, civil servants and independent professions, in order to draw a portrait of the best paid professionals entry level engineering jobs.

Right off the bat, let's turn on a - big - flashing light, for several reasons. Do not go looking for detailed and recent figures, they are not published. For the private sector, we must therefore be satisfied with partial data, which date from 2012 ... They were calculated by the Ministry of Labor in a document published in 2015  [ 1 ]. Second, and above all, the data for the private, public and independent industries are not based on the same bases or on the same years. For the private sector and the self-employed, we have retained, for lack of a better solution, the remunerations of the 10% best paid within professional categories which are sometimes quite broad, which can lead to leaving professions in the shade that a nomenclature more precise could bring to light. For the public, we use the average salaries of positions at the top of the hierarchy. In short: these data are orders of magnitude to understand how much you can earn at work when you are at the top of the scale. Obviously, there is always higher: by using the entry threshold in the 10% best paid of a trade, we do not observe here the incomes of the top of the top, which can be much higher.

In the private sector

At the very top of the salary scale, we find "executives of transport, logistics and aircrew" (a category which includes in particular airline pilots, who raise salaries upwards), for whom the best paid 10% receive at least 7,000 euros net monthly. They are followed by salaried doctors (the majority of doctors practice in private practice, let us not forget, and are therefore not salaried) with a salary of at least 6,400 euros, and by executives of the bank and insurance companies. (more than 6,000 euros). Next come other business executives, researchers, senior communications and information executives, followed by computer engineers. All young computer engineers, however, are far from touching 5,000 euros per month.

In the public sector

Some civil servants, civil servants or contract workers, also earn a very good living. We enter the best paid 10% (around 500,000 employees) from 3,260 euros net per month and into the best paid 1% (50,000 employees) from 6,410 euros  [ 2 ] . About 5% of civil servants receive more than 4,000 euros per month, double the median civil service salary. A large part of these high salaries are made up of doctors and hospital directors: they represent more than half of the top 1% in the public, while the hospital public service represents 22% of the public sector workforce.

Management jobs abroad (posts in embassies, consulates, etc.) in the state civil service are the best paid with an average salary of 13,800 euros net per month. Still in the State civil service, then come the senior management positions known as “at the decision of the government” (prefects, ambassadors, CEOs of public enterprises, etc.) with 10,500 euros per month on average, then general administrators. public finances (such as the general treasurer-payer) which affects 8,300 euros. Please note: these are small numbers. On average, the senior management staff of the State receives about 6,600 euros net monthly, all ages combined.

The self-employed

It is almost impossible to know who are the best paid among the self-employed - more than three million people, or about 10% of those who are employed. For this category, INSEE does not disseminate data by profession, but by sector of activity. However, in the same sector, we can have very different professions and very heterogeneous salaries. We sorted the self-employed according to the standard of living of the richest among them in terms of monthly earned income. This makes the richest appear but also masks the income inequalities that exist in each sector of activity.

Lawyers and accountants are in the hierarchy: the top 10% have net income per month of more than 19,000 euros. They are followed by doctors and liberal dentists, with at least 17,700 euros per month, pharmaceutical businesses and insurance and finance activities, with more than 13,400 euros. Then there are veterinarians, non-employees in management consulting, wholesale trade, or even architects  

Wednesday, February 10, 2021

POSITION OF A TEMPORARY WORKER REPLACING THE DECREATED

This possibility falls under the grounds for concluding a fixed-term employment contract provided for in par. 2 part 1 of Article 59 of the Labor Code (LC), according to which "for the duration of the duties of an employee, for whom, in accordance with labor legislation and other regulatory legal acts containing labor law norms, a collective agreement, agreements, local regulations, an employment contract the place of work is saved contingent employee.

In some organizations, the expiration of such a contract is often associated with the onset of a specific date. In fact, fixed-term employment contracts are terminated with the onset of a certain event, namely the release of the main employee to work (part 3 of Article 79 of the Labor Code).

By prescribing such provisions in the contract, the employer thereby creates an extra headache for the future. The temporary worker reasons as follows: "The contract says that it is valid until April 15, 2009. Therefore, if I was not fired after that date, then my contract has become indefinite."

In the current legislation, there is no such thing as maternity leave. As a result, it turns out that the employee can only mean maternity leave by it, and the employer including parental leave.

As a result, a conflict may arise between the employer and the employee hired under a fixed-term employment contract.

Who is right?

According to the first point of view, with the end of the period specified in a fixed-term employment contract, its validity period expires. Indeed, according to Article 58 of the Labor Code, in the case when none of the parties demanded the termination of a fixed-term employment contract due to its expiration and the employee continues to work, the condition of the urgent nature of the employment contract becomes invalid and the employment contract is considered concluded for an indefinite period. And if the period is over, the fixed-term employment contract has ended.

Let's consider the situation.

A fixed-term employment contract was concluded with a woman for the period of maternity leave of another employee. The employer and the employee did not agree on what it was. The woman believed that after the main employee, without leaving work after maternity leave, took parental leave, her employment contract was transformed into an indefinite one. When the main employee returned, her replacement employee was fired.

The court, examining the case and identifying whether there was a transformation of the employment contract, considered that it was necessary to establish what maternity leave was. Maternity leave is a name sometimes used in everyday life for maternity leave. The court recognized the fact of transformation of a fixed-term employment contract into an unlimited one.

This is not an entirely correct solution to the question.

Firstly, part 3 of Article 79 of the Labor Code directly provides that the employment contract concluded for the duration of the performance of the duties of the absent employee terminates with the release of this employee from vacation. The Labor Code itself connects the end of a fixed-term employment contract not with the end of the period specified in the employment contract, but with the exit of the main employee. Moreover, according to the Labor Code, it does not matter whether it came out earlier or later.

Secondly, the current labor legislation, as a general rule, does not provide for the extension of a fixed-term employment contract. Therefore, if one is of the opinion that his term expires with the end of the corresponding period, then the employer must dismiss the temporary employee, and the next day he must be hired again for a new period. Moreover, such periods can last for several days.

Thirdly, the purpose of concluding a fixed-term employment contract with a temporary worker is to replace the main employee; circumstances - absence from work of the main employee, preservation of the place of work for the main employee. If the circumstances and purpose have not changed, then there is no need to talk about the expiration of the employment contract, even if it contains specific dates that have long passed, or periods that smoothly flowed into new ones.

Consequently, the term of an employment contract with a temporary employee does not end with the end of the period specified in the contract, but with the release of the main employee.

If the temporary worker also got pregnant?

If the main employee goes to work while her replacement pregnant employee is still working, then some global problems should not arise. In this case, according to Article 261 of the Labor Code, at the request of the woman and upon presentation of the relevant medical certificate, the employer must extend the term of the employment contract until the end of the pregnancy. At the same time, if the employment contract was concluded for the duration of the duties of the absent employee and it is impossible to transfer the woman before the end of her pregnancy to another job available to the employer, then dismissal is allowed.

And if the main employee did not leave during the pregnancy of another employee, but already during her period of being on parental leave?

Some experts believe that it is possible to fire a temporary replacement employee, despite the fact that she is on parental leave. Firstly, a fact-event has occurred, and secondly, it is prohibited to dismiss an employee during his temporary incapacity for work or while on vacation only if the employment contract is terminated on the initiative of the employer. Accordingly, if the employer did not dismiss the temporary worker while she was on parental leave, then her fixed-term employment contract is transformed into an unlimited one.

Tuesday, February 9, 2021

This is how an FTTH network with GPON technology works

To understand how fiber optic technology further optimizes our connectivity, one has to answer the following question: What is GPON? We explain how it works contingent meaning.

In order to provide us with fast Internet at home, telecommunications operators have various technologies to choose from. The most modern one is based on fiber optic cables and is therefore called Fiber-to-the-Home (FTTH). The FTTH variant more common in Europe is the Gigabit Passive Optical Network, or GPON for short. Here's how GPON works.

The evolution of the internet: faster, better, stronger

The internet has revolutionized our lives since the mid-1990s. The demand for faster, more reliable traffic continues to grow. High definition or 4K streaming, teleworking, and video conferencing are some of the popular Internet services that are skyrocketing the demand for data and bandwidth. The exit restrictions and the lockdown during the Covid-19 crisis have shown how important a good, reliable internet connection is in your own four walls. Thanks to fast internet, we can work efficiently from home, maintain our conversation habits and keep in touch with family and friends via video conference. During this time, the data traffic in all networks has increased significantly.

The first telecommunications networks used copper cables as a medium for signal transmission. For many years these networks were used for basic telephony services, mainly for voice calls and telegrams. With the spread of the Internet since the mid-1990s, voice calls have gradually been replaced by data. And because copper cables quickly reached their limits when transmitting data, a new medium was developed: fiber optic technology.

But why can higher speeds and bandwidths be achieved with fiber optics than with copper technology? Copper cables transmit electrons, while fiber optic cables transmit photons. In other words: glass fibers transmit information using light waves that move much faster than electrons. In addition, light signals do not weaken as much as the electrical signals in copper cables, even over long distances.

The first optical networks emerged in the late 1980s. Initially, fiber optics was used for sea or long-haul cables between large cities such as New York and London or London and Paris. Gradually, copper cables in the entire Internet core network, the backbone, were replaced by optical cables.

As the backbones increased their capacity with the help of fiber, the technology gradually became more widespread - first in large companies and public administrations, and eventually in our homes.

GPON - a flow of light

How is a GPON structured?

The Optical Line Terminal (OLT) is the main element of the network and is located in the switching center of the telecommunications operator, the Central Office. A laser in the OLT feeds the photons from the exchange into an optical fiber made of glass and plastic that ends at a passive optical splitter . The splitter divides the signal received from the exchange into numerous signals, which are ultimately forwarded to up to 64 outputs (customers). The number of customers served by a laser depends on the technical parameters of the operator. The operator often reduces the number of outputs to 32.

In addition, the operator can split the signal twice, for example once into eight and then again into four in the further course of the cable. The maximum distance to the exchange can be 20 kilometers. However, the operators usually limit the distance to 16 kilometers in order to be able to offer a good service.

For Andrés Gavira Etzel, senior engineer at the European Investment Bank, the advantage of fiber optics lies in the lower signal attenuation . In other words, unlike copper cables, the signal strength is largely retained over long distances.

“You can think of the two technologies like a river flowing through a small town,” explains the engineer. “With copper, the channel becomes narrower and narrower, making it more and more difficult for the electrons to flow through. With the glass fiber, the channel does not change, and the photons can continue their way largely unhindered to the end point. In addition, the signal from one copper cable changes the signal from a neighboring cable, which further worsens the signal strength. "

Fast internet is available to all households within a radius of 16 kilometers from an exchange. With ADSL technology, on the other hand, the signal becomes weaker and weaker as the distance increases, with the loss of signal already being considerable after three kilometers.

The fiber optic technology is at least ten times more powerful: While copper-based networks achieve transmission rates of up to 100 megabits per second, optical networks can achieve up to one gigabit per second. The differences are often even greater because the transmission rate for copper cables is usually less than 50 megabits per second.

Monday, February 8, 2021

What is the terms of reference

A technical assignment is where a high-quality functional product begins. At least if TK itself was such. If the document is drawn up unprofessionally and without due care, the result will be appropriate.

Given the nature of the target audience of the blog and the general trends, it probably makes sense to describe the terms of reference specifically for digital products. In many ways it will be so, but we must not forget that the most common, "analog" products also require documentation. They demanded it even before the Internet itself. Therefore, to broaden the horizons and for the benefit of representatives of non-digital industries, it is worth bringing references to offline projects define sow.

Our products help your business optimize marketing costs

TK is part of a multilevel development process

What is the technical task for?

The terms of reference is no less important than a legal act in securing the rights and obligations of the parties - the customer and the contractor.

In fact, these are instructions for developers, designers and other direct creators of the final product. But in fact, the technical task, defining strict requirements for each detail, makes the cooperation between the customer and the contractor safer and more comfortable.

When every little thing is regulated, everything is in its place, everything with its own powers and responsibilities, there is little room for dishonest maneuver and misunderstanding. Ideally, when it does not remain at all.

Moreover, a specific and holistic technical assignment is the first step towards a high-quality result. In order for the product to work accurately, without failures, and simply safely - this is also on the agenda from time to time - all its elements must be thought out. Carefully and meticulously.

The technical task is the basis of both simple monosyllabic products and high-load systems. In each case, scenarios of functioning should be provided. Any user action must be foreseen, and the response to it must be a useful result.

It is in order for the work with the final product to evoke a positive response from the user and solve his problems, it is necessary to work out the idea and details of the project at the earliest stage.

How to draw up a technical task

As a first approximation, the main requirements for the terms of reference are thoughtfulness and completeness. But, since not in all cases the compilers are able to comply with these conditions, generally accepted standards for the development of TK were developed.

In many vacancies for the position of a systems analyst or technical writer, you can meet the requirement: knowledge of GOST 19 and GOST 34. What is it?

From the name it is easy to understand that these standards are adopted at the national level and are a recommended model for the development of technical specifications in Russia.

At the same time, it should be remembered that these two GOSTs are related specifically to software systems. That is, in the modern sense - to sites, applications, automation systems. The terms of reference for the placement of a catering enterprise in a budgetary institution will have to be written according to different rules.

Thursday, February 4, 2021

INTERNET SECURITY FUNDAMENTALS: FIREWALL

WHAT IS A FIREWALL?

Firewall, firewall, firewall or firewall - all these words mean the same thing: a kind of barrier that protects the entire network or parts of it from the transmission of malicious packets and intrusion by hackers. A firewall is installed at the junction of two networks, usually between the world wide web and the corporate network. There are also so-called client firewalls that are installed on the end user's computer and only protect it. Firewalls can be used both as hardware solutions and as software. The firewall scans all incoming and outgoing traffic according to certain previously configured criteria. If the transmitted data meets these criteria, the firewall will let it through. If they do not match, it blocks. The transmitted data is filtered based on the following criteria: what is a firewall

Address filtering: the source and destination (source and destination) addresses and port numbers are checked

Protocol filtering: the type of network traffic is checked, for example, HTTP or FTP

The attributes and status of the data packets being sent are also checked.

However, the firewall does not provide automatic network protection. The effectiveness of its application directly depends on how the firewall is configured.


FIREWALL CONFIGURATION

There is no single answer to the question of how to properly configure your firewall. The required settings depend on many factors and may require changes, for example, when new applications, devices or users are added, when access rights change in connection with the tasks and roles in the business, when cloud technologies and mobile devices begin to apply.

Firewalls are needed not only to protect stationary information technologies. They are also important for controlling applications on the web, in the clouds or on mobile devices. Regular checks and adjustments of firewall settings are necessary not only because the IT landscape is constantly changing, but also due to the constant change and complication of cyber threats. Once established, filtering rules can significantly differ from the actual need for protection without timely checking and adjusting the settings, which allows fraudsters to gain access to confidential information. How often the firewall settings need to be checked depends on the level of risk and changes in the existing IT infrastructure.

Also, remember that it is important to not only keep the configuration up to date, but also to protect the firewall logging. This means that the protocols should be encrypted and verified using a double-check principle, and the logging data should be stored as carefully as possible.


METHODS FOR USING A FIREWALL

Firewalls can be used in a variety of ways. The simplest is a packet filtering router. The router configures various packet filters that control data transmission based on the source and destination addresses and port numbers. Typically, conventional IP routers work with this method. Since this is a fairly simple procedure, the cost of such a firewall will be low. However, using this method alone does not provide sufficient protection. Even a simple spoof of an IP address will be enough to gain unauthorized access.

If you connect a firewall system between two packet filtering routers, this method will be called "bastion node". The outside router is responsible for filtering IP traffic between the bastion host and the Internet, while the inside router only allows IP traffic between the inside network and the bastion host. This method of protection is very effective, but also quite costly, since in addition to two routers, a firewall system is also required. In addition, setting up such a system can be quite complex. A well-managed and effective solution is found by many companies to use a firewall server because it includes the following features:

internal and external firewall,

bastion knot,

web application server.

The Firewall Server is a complete solution that includes everything you need for related Internet services. The more filtering and access control methods you use, the more security you can achieve.


HACKER ATTACKS ON FIREWALL

Hacking is the most common attack scenario: a hacker gets into someone else's computer and thus can track and modify user data, identifiers and files. Hacks often go unnoticed. Attackers manage to get into someone else's computer without leaving a trace.

The second common scenario is to disable certain services so that other users cannot use a particular computer or port. This form of electronic sabotage can corrupt data as well as damage your device. Most attacks of this kind are carried out by overloading: A fraudster overloads the system or network, for example, with a stream of network requests, messages or other processes, as a result of which the user cannot operate efficiently. An attacker could also disable, replace, or redirect some services. Unfortunately, quite often usernames, passwords and IDs are transmitted unencrypted in plain text, so they can be easily eavesdropped on the network. This is also used by scammers to steal information.

Network technologies such as Ethernet or Token Ring can intercept all network traffic on a local network. As in the case of hacking, scammers almost never leave a trace here, so data theft is rarely detected.

Wednesday, February 3, 2021

How Much Does the CompTIA A+ Certification Cost?

It's a simple question, but there can be multiple answers based on your situation and the options you choose. You will need two vouchers to pass two exams to certify.

You may qualify for discounts that can decrease the cost, and you may want to consider additional learning and training that can change the bottom line as well. Read on to find out more.


The Basics: CompTIA A+ Exam Voucher Only

In order to take the certification test, you’ll need to buy an exam voucher. A voucher represents a unique code that you can buy at the CompTIA Store and use to take your test at a Pearson VUE testing center. If a voucher is all you need, then the cost is $232 per exam. Find more details about the exam on the CompTIA A+ product page and information on how to buy a voucher on our testing pages. If you’re ready to buy, head over to the store.

If you don’t pass an exam, you’ll need to purchase another voucher to take another test. We recommend that you go into your exam well-prepared to minimize the chance of not passing the test and having to purchase an additional voucher. Read on to find out about training and test preparation options.

Training and Exam Preparation

Our CompTIA Learning and Training offering is a set of comprehensive learning resources to support our certifications like CompTIA A+. This suite of products includes books, eLearning, labs and exam prep software and is developed in house by CompTIA, based on feedback we hear from learners like you. These resources provide you with a variety of ways to acquire all or some of the knowledge that is outlined in the CompTIA A+ exam objectives.

Self-Study

The self-study guide will teach you the fundamental principles of installing, configuring and troubleshooting PC, mobile, printer and networking device hardware and help you to advance a career in PC support. It will prepare you to take the CompTIA A+ exam by providing 100 percent coverage of the objectives and content examples listed on the syllabus. Browse our store or visit the Official CompTIA A+ Study Guide page to learn more.

Another great way to get an idea of what questions you can expect is to download a set of practice questions. Keep in mind that these practice questions are not the exact questions that will be on the actual test and that there will be different kinds of questions.

Self-Study and Test Preparation

The CompTIA CertMaster suite of products helps candidates learn the skills needed for a career in technology, and to prepare for their exam with confidence.

The following CertMaster products are now available for CompTIA A+: a plus certification jobs

CertMaster Practice for CompTIA A+

CertMaster Labs for CompTIA A+

Tuesday, February 2, 2021

How Much Can I Make with a CompTIA Security+ Certification?

IT security offers countless paths to fulfilling jobs and rewarding pay – you determine the direction and, ultimately, how much money you can earn with CompTIA Security+. Not everyone has the same reason for getting certified. In general, you can apply your CompTIA Security+ certification in the following ways: comptia certification jobs

Attract the attention of employers with an endorsement of your skills that is respected globally and industry wide.

Position yourself as a top candidate for entry-level cybersecurity positions.

Confirm to yourself that you've mastered the latest skills and concepts that act as the foundation of a career in cybersecurity.

In all scenarios, CompTIA Security+ can serve as a springboard for cybersecurity careers, ensuring security professionals are better prepared to solve a wide variety of issues when securing and defending networks in today's complicated business computing landscape.

Jobs That Require or Benefit from a CompTIA Security+ Certification

Planning the entry-level point for your cybersecurity career, as well as your aspirations and how much work you’re willing to put into growing your career, have great impact on how much you can make in any job, and security is no exception. Here are a few common job titles that use CompTIA Security+:

Systems administrator

Security specialist

Security engineer

Network administrator

Junior IT auditor/penetration tester

Security consultant

The job roles covered by CompTIA Security+ are categorized under network and computer systems administrators by the U.S. Bureau of Labor Statistics. The number of jobs in this category is expected to grow by more than six percent by 2026. The median pay in 2017 was $81,100.

The Reality of Mean Salary Percentiles

When researching salaries and aiming your career at specific job titles, remember that you may see a range of salaries for one particular job because some companies and geographies will pay more than others. Companies that pay more may also demand more, in terms of experience or responsibilities. The result is a range of possible salaries for any particular job title and the reality of mean salary percentiles.

Let’s look at the systems administrator as an example. While the above median salary gives you a sense of where the majority of salaries fall, the U.S. Bureau of Labor Statistics also gives percentiles that show the highest and lowest salaries for that job title:

Systems administrator 90th percentile $130,200

Systems administrator 75th percentile $104,460

Systems administrator 50th percentile $81,100

Systems administrator 25th percentile $63,020

5 Ways to Boost Your Pay

The pay you can expect from a particular IT job can vary significantly from the median pay depending on a number of factors that may benefit your role for a certain position. Here are five ways that can help increase your pay:

Prior Experience: Reducing training time and having expertise that goes beyond your job description may increase your value to an employer. Similarly, prior related job experience provides trust and builds expectations on the side of an employer that can benefit the numbers on your paycheck.

Additional Training and Certifications: If CompTIA Security+ isn’t your first certification and if you can showcase additional completed training, you may expand the reach of your certifications and qualify for jobs that you otherwise would not, and subsequently become candidate for a higher-paying position. Review CompTIA’s stackable certifications to find out how you can build your IT career path with CompTIA certifications. CompTIA IT Pro Membership also offers access to training for IT professionals.

Commitment: Becoming certified is your first step to your career. Staying certified is even more important and can show employers that you’re committed to your job and that you’re in-sync with a rapidly evolving industry.

Regional Differences: The pay for a job in one area may be vastly different than what is offered in another area. For example, a systems administrator working in New York City, on average, will make about 15 percent, or $14,650 more than the exact same position in Denver.

Industry Variations: Keep in mind that some industries may have, in their details, different expectations for certain job titles than others and offer different pay as a result.

Monday, February 1, 2021

Cyber ​​Security Officer

 Main job responsibilities: comptia a+ jobs

• Intelligence Research;

• Investigation of APT attacks;

• Cyber ​​Incident Investigation;

• Digital evidence collection;

• OSINT;

• Forensic science and Computer forensics;

• Penetration Testing;

• IT management and management of 5 regional offices;

• SOC Officer;

• Programing;

• Conduction of audit of security;

• Risk Management and Risk Assessment;

• Reverse engineering;

• Conduction of audit of security;

• Vulnerability searching;

• Hacking preventing;

• Eliminate the consequences of hacking;


Information security engineer

"MSB Cybersecurity" Inc., Kiev (Consulting in the sphere of information security)

- Development, implementation and support of information security

systems

- Implementation of security procedures in business and IT process

- Conduction of audit of security

- Management of information security of end-user systems

- Penetration test

- Operational management of the DLP system

- Implementation and configuration of IPS / IDS, SIEM, WAF systems

- Participation in the process of investigation of Informational Security

incidents

- Vulnerability analysis, information risk assessment

- Enterprise preparation for certification ISO 27001

- Setting up Wi-Fi networks security

Sunday, January 31, 2021

Step by step instructions to Save Cisco CDR Data in MySQL

Various affiliations use the Cisco Call Manager as their fundamental correspondence stage. Cisco Call Manager is potentially the most striking stages with various features and capacities. Creators wanting to use the Cisco Call Manager call information in their applications, for instance, CRM, charging or helpdesk should contribute a huge load of energy sorting out some way to understand the Cisco structure and how they can deal with that information clearly from the Cisco Call Manager cisco cucm

Today, I need to show you how you can save your Cisco Call Manager data to a Mysql table with the Node.js content. I use the PBXDom API, astonishing call examination and reporting instrument, to achieve that level headed. Along these lines, in case you are interested, we should go cisco telephone worker. 

Stage 1. 

Most importantly, you should seek after a PBXDom account. Fortunately, you can endeavor 14 days to no end; by then you should present the finder programming and interface it to your CUCM. All of them need around 10 minutes of your time. I suggest examining the going with article about how to interface your Cisco Call Manager to PBXDom and access the dashboard and reports, and besides connecting with API. 

Stage 2. 

Ensuing to marking in to your PBXDom account, go to Settings – > account and get your API key. 

Get-API-Key-Cisco-CDR-Mysql 

Stage 3. 

Preceding going to the accompanying stage, guarantee your CUCM is related with PBXDom, and you can see your call information in the dashboard. 

pbxdom-dashboard-cisco-call-boss 

Stage 4. 

PBXDom offers RESTful API, which implies we can relate and use it with any programming language, anyway today I need to use maybe the most and notable back-end programming lingos, Node.js 

I will probably interface with PBXDom API and get all the call information, by then install it into a MySQL table. Furthermore, that substance should have the alternative to run continually and get new data normally, so we are ordinary reliably have the latest information in our MySQL table. If you need to use the call information for another explanation, you can change the circumstance to meet your necessities rather than embeddings the data into a MySQL

Thursday, January 28, 2021

CISCO Wireless Network Engineer

A few associations, including numerous neighborhood specialists and other public area bodies, re-appropriate all their IT frameworks to trained professionals, so these expert organizations regularly have opportunities for individuals with systems administration abilities. 

Organization specialists can be utilized by a huge IT organization to deal with the association's own frameworks or work in their agreement administrations. 

Enormous organizations, for example, Microsoft, give a broad scope of establishment and client care administrations and they cisco voice engineer jobs select alumni and experienced staff into all regions of IT uphold. 

There are additionally numerous little consultancies that work by setting up and overseeing frameworks for associations that are too little to even consider justifying full-time IT uphold. 

Search for work opportunities at: 

CWJobs 

efinancialcareers 

IT Jobs Online 

Technojobs 

Enrollment offices spend significant time in IT, for example, Hays likewise have opportunities, albeit these are more helpful whenever you've developed some strong work insight. 

While huge organizations for the most part have an organized alumni enrollment strategy, you can move toward independent companies and IT consultancies on a theoretical premise, guaranteeing your CV anxieties your own, just as specialized, capacities. 

Contracting might be a choice whenever you've acquired significant experience - visit Contractor UK for more data. Most places of work incorporate worker for hire jobs also. 

Proficient turn of events 

Because of the quickly changing nature of the business and the abilities required, you'll need to make preparing a steady piece of your vocation improvement. 

Huge organizations may send you on instructional classes and will give preparing as they present new frameworks or extend their IT offices. 

Be that as it may, you'll frequently need to search out suitable preparing for yourself, particularly in case you're looking for advancement, a lifelong move or are independently employed. 

Applicable capabilities include: 

Cisco Certification Program - accessible at section (CCENT), partner, (CCNA), proficient (CCNP), master (CCIE) and designer (most elevated level of accreditation attainable) levels 

CompTIA Certifications - including CompTIA A+ and CompTIA Network+ 

Juniper Networks Certification Program (JNCP) - accessible at partner, trained professional, expert and master levels 

Microsoft Certifications - including Microsoft Certified Solutions Associate (MCSA) and the more significant level Microsoft Certified Solutions Expert (MCSE). 

Courses can be costly and you may need to pay the charges yourself, so ensure they're applicable to your profession advancement points. 


Wednesday, January 27, 2021

Functioning AS A VOICE ENGINEER

There is undiscovered greatness under the surface the eye with regards to being a voice engineer. For instance, did you realize that they make a normal of $44.86 60 minutes? That is $93,315 every year! 

Somewhere in the range of 2018 and 2028, the profession is relied upon to become 5% and produce 8,400 open positions across the U.S. 

What Does a Voice Engineer Do 

There are sure abilities that many voice engineers have to achieve their obligations. By investigating resumes, we had the option to limit the most well-known abilities for an individual in this position. We found that a great deal of resumes recorded insightful abilities, math abilities and initiative abilities. 

With regards to the main abilities needed to be a voice engineer, we found that a great deal of resumes recorded 8.8% of voice engineers included voip, while 7.1% of resumes included solidarity, and 6.2% of resumes included qos. Hard abilities like these are useful to have with regards to performing fundamental occupation obligations. 

With regards to looking for a work, many quest for a key term or expression. All things considered, it very well may be more useful to look by industry, as you may be missing positions that you never pondered in enterprises that you didn't think extended to situate identified with the voice engineer employment opportunity title. In any case, what industry to begin with? Most voice designs really secure positions in the innovation and money enterprises. 

Get familiar with What A Voice Engineer Does 

The most effective method to Become a Voice Engineer 

In case you're keen on turning into a voice engineer, one of the primary interesting points is how much training you need. We've established that 42.9% of voice engineers have a four year college education. As far as advanced education levels, we found that 14.3% of voice engineers have graduate degrees. Despite the fact that most voice engineers have a professional education, it's conceivable to get one with just a secondary school degree or GED. 

Picking the correct major is consistently a significant advance while investigating how to turn into a voice engineer. At the point when we investigated the most widely recognized majors for a voice engineer, we found that they most regularly acquire four year college education degrees or partner degree degrees. Different degrees that we frequently see on voice engineer resumes incorporate graduate degree certificates or secondary school recognition degrees. 

You may find that experience in different positions will help you become a voice engineer. Truth be told, many voice engineer occupations require insight in a job, for example, network engineer. Then, many voice designs likewise have past vocation experience in jobs, for example, frameworks head or organization specialist.

Tuesday, January 26, 2021

Companies using Cisco Unified Communications Manager

We have data on 13,155 companies that use Cisco Unified Communications Manager (CallManager). The companies using Cisco Unified Communications Manager (CallManager) are most often found in United States and in the Computer Software industry. Cisco Unified Communications Manager (CallManager) is most often used by companies with 1000-5000 employees and 10M-50M dollars in revenue. Our data for Cisco Unified Communications Manager (CallManager) usage goes back as far as 5 years and 2 months.

If you’re interested in the companies that use Cisco Unified Communications Manager (CallManager), you may want to check out Skype and Zoom as well.

Who uses Cisco Unified Communications Manager (CallManager)?

Some of the companies that use Cisco Unified Communications Manager (CallManager) include:

Company Website Country Revenue Company Size

EdisonLearning, Inc. edisonlearning.com United States 100M-200M 1000-5000

J & D RESOURCES, INC jdresources.com United States 1M-10M 10-50

Penguin Random House LLC penguinrandomhouse.com United States >1000M >10000

Royal Academy of Arts royalacademy.org.uk United Kingdom 100M-200M 500-1000

Willis Towers Watson willistowerswatson.com United Kingdom >1000M >10000

Target Cisco Unified Communications Manager (CallManager) customers to accomplish your sales and marketing goals.

Customize Cisco Unified Communications Manager (CallManager) users by location, employees, revenue, industry, and more cisco cucm.

Cisco Unified Communications Manager (CallManager) Market Share and Competitors in Unified Communications

We use the best indexing techniques combined with advanced data science to monitor the market share of over 12,500 technology products, including Unified Communications. By scanning billions of public documents, we are able to collect deep insights on every company, with over 100 data fields per company at an average. In the Unified Communications category, Cisco Unified Communications Manager (CallManager) has a market share of about 3.1%. Other major and competing products in this category include:

Cisco Unified Communications Manager (CallManager)

Unified CommunicationsShare this report: twitter share facebook share linkedin share

13,155

Companies using Cisco Unified Communications Manager (CallManager)

Cisco Unified Communications Manager (CallManager) market share in Unified Communications is about 3.12%Unified Communications

Cisco Unified Communications Manager (CallManager) (3.12%)

Zoom (13.80%)

Skype (13.67%)

Adobe Connect (13.41%)

View other alternative products

What is Cisco Unified Communications Manager (CallManager)?

Cisco Unified Communications Manager is a unified communications call control platform that can deliver the right experience to the right endpoint.It provides services such as session management, voice, video, messaging, mobility, and web conferencing.Cisco Unified Communications Manager is available in a choice of deployment models: public cloud, private cloud, on-premises, remote, or hybrid.

Top Industries that use Cisco Unified Communications Manager (CallManager)

Looking at Cisco Unified Communications Manager (CallManager) customers by industry, we find that Computer Software (15%), Hospital & Health Care (6%) and Information Technology and Services (6%) are the largest segments.

Companies using Cisco Unified Communications Manager (CallManager) - Distribution by industry

Top Countries that use Cisco Unified Communications Manager (CallManager)

61% of Cisco Unified Communications Manager (CallManager) customers are in United States and 6% are in United Kingdom.

Cisco Unified Communications Manager (CallManager) customers by country

Distribution of companies that use Cisco Unified Communications Manager (CallManager) based on company size (Employees)

Of all the customers that are using Cisco Unified Communications Manager (CallManager),19% are small (<50 employees), 43% are medium-sized and 40% are large (>1000 employees).

Sunday, January 24, 2021

Cisco extends Nexus Dashboard to traditional network

With the integration of its data center management software with its Nexus Dashboard, Cisco enables support for traditional network environments voice engineer job.

The OEM Cisco has added support for traditional network environments to its Nexus Dashboard data center management console. Delivered in October, the dashboard, which brings together several Cisco fabric management tools, on-premises, in the cloud, and in hybrids, enables the entire application lifecycle to be administered in the same interface, from provisioning to '' maintenance and optimization. According to Cisco, "the dashboard thus provides a central platform for data center operating applications, simplifying operational work and application management, while reducing the infrastructure costs to run them."

For example, "With support for Cisco's Multi-Site Orchestrator tool, which provision, monitors, and manages Application Centric Infrastructure (ACI) network resources, the Nexus Dashboard can set network control policies and applications for on-premise or cloud environments, ”Cisco explained. ACI is Cisco's flagship software for software-defined data center networks (SDNs). It also provides network automation technology. More recently, Cisco said it has added similar support for its Data Center Network Manager (DCNM) software that manages existing networking systems running NX-OS. For customers, this means they can control new ACI-based cloud and edge resources from a single console,

Cloud agnostic management Nexus Insights, the other key element of the Nexus Dashboard, allows customers to monitor and analyze their fabric in real time to identify anomalies, provide root cause analysis, plan capacity, and expedite troubleshooting. “This application can now work with ACI and DCNM environments,” said Cisco. “Nexus Dashboard is an intuitive and easy-to-use console for automating the entire data center lifecycle. It helps make infrastructure, governance and security operations highly automated, based on company policies and key performance indicators. It really is a giant leap, ”wrote Usha Andra, Product Marketing Manager, Cisco Data Center Networking Portfolio, in a blog presenting the console in detail. “The process of focusing architectural decisions on these types of metrics, rather than managing the infrastructure lifecycle in silos ... marks a decisive cultural and operational change,”

“Cisco's primary goal is to provide customers with the cloud-agnostic orchestration and network support they need to deploy and support workloads wherever they are deployed,” said Todd Nightingale, vice president Cisco senior and general manager Enterprise Networking & Cloud, in a recent Network World article. “The idea is to focus on offering powerful network and software options on a reduced number of integrated platforms in order to simplify and bring great agility to businesses,” added Nightingale. At the time of Nexus Dashboard release, Cisco had stated that its dashboard supported services provided by third parties like ServiceNow for incident management, AlgoSec for security policy, Splunk for business intelligence and F5 / Citrix for load balancing. “Further third-party integrations are expected,” Cisco said. The system also supports open source software, including the Red Hat Ansible IT automation platform and Hashicorp's Terraform infrastructure as code environment. Nexus Dashboard is available now as an appliance. Later in the first quarter, Cisco will also offer its console as a virtual cloud instance. Hashicorp's Terraform infrastructure environment as code. Nexus Dashboard is available now as an appliance. Later in the first quarter, Cisco will also offer its console as a virtual cloud instance. Hashicorp's Terraform infrastructure environment as code. Nexus Dashboard is available now as an appliance. Later in the first quarter, Cisco will also offer its console as a virtual cloud instance.