CCNA4. Design and support of computer networks

The goal of this course is to help develop the skills required to design small corporate LANs and WANs. The course is a short tutorial on gathering information about customer requirements, choosing equipment and protocols based on those requirements, and creating a network topology to meet customer needs. Issues related to the creation and implementation of the proposed project for the client are also considered. The course aims to develop the practical skills required to work as Presales and Entry-Level Networking Professionals.

Upon completion of this course, you will receive information on the following topics: cisco wireless certified

the goal of proper network design;

Using the Cisco Network Lifecycle Method in Design;

methods of describing existing networks to prepare for their modernization;

the impact of various applications and services on network design;

requirements for the design of the central level, distribution and access levels for the enterprise complex, including wireless access and security;

design requirements for WAN connections at the enterprise edge and VPN support for remote workers;

testing and verification of the design of the network of the enterprise campus and the global network;

preparation and presentation to the client of a commercial proposal for network modernization.

An introduction to the concept of network design. Basics of network design. Design analysis at a central level. Analysis of distribution level issues. Analysis of design issues at the access level. Analysis of server farms and their protection. Analyze wireless network issues. Support for WAN and remote workers.

Determine network requirements. Implementing Cisco Lifecycle Services. Explanation of the sales process. Preparation for design. Determination of technical requirements and limitations. Define the design requirements for manageability.

Description of the existing network. Documenting the properties of an existing network. Upgrading an existing Cisco IOS OS. Modernization of existing equipment. Survey of the wireless area. Documenting the requirements for the network design.

Determine the impact of applications on the network design. Description of network applications. Basic network applications. Implementation of quality of service (QoS service). Analysis of voice and video capabilities. Traffic and application streams recording.

Network project creation. Requirements analysis. Choosing a suitable LAN topology. Designing WAN and remote worker support. Design of wireless networks. Enabling protective equipment.

Using IP addressing in the network design. Creation of an appropriate IP addressing project. Create an IP addressing and naming scheme. Description of IPv4 and IPv6.

Creation of a network prototype for a complex of buildings. Prototyping to validate the project. Prototyping for LAN. Prototyping a server farm.

Tests on a prototype WAN network. Testing a remote connection on a prototype. Testing WAN connectivity on a prototype. Testing support for remote workers on a prototype network.

How does fiber optics compare to electrical cables?

There are some technical areas, such as optical data transmission, where optical fibers compete with electrical cables, and there are other areas where fiber optic cables have significant advantages : How do fiber optics work

Optical cables are much lighter

Fiber capacity for data transmission is an order of magnitude higher

Signal attenuation can be very low

A large number of channels can be re-amplified in a single fiber amplifier

Fiber optic data transmission is difficult to intercept and manipulate, providing greater security

Fiber optic connections are immune to EMP

Fibers do not pose a fire hazard

However, fibers have disadvantages:

Optical connections are sensitive and difficult to handle. Alignment must be accurate and optimum cleanliness is required.

The fiberglass must remain relatively straight to prevent loss or breakage.

Overall, it is clear that the advantages outweigh the disadvantages, making fiber optics a remarkable innovation.

What are fiber optics used for?

We don't understand how ubiquitous fiber optic cables have become. The laser signals transmitted over these cables are hidden under the sidewalk and even under the ocean floor. The technologies that use these cables are as varied as the light signals themselves.

Computer networks

Fiber optic cables mainly carry information over long distances. This creates optimal conditions for data transfer. Fiber optic cables have many advantages over older styles of electronic transmission:

Less signal loss. Information travels 10 times further before it needs amplification

No interference. Fiber optic cables are less susceptible to electromagnetic interference

Higher throughput. Fiber optic cables carry much more data than older cables of the same size

Computers were once connected over long distances using telephone lines or Ethernet cables, but fiber optic cables have replaced these options because network computers with fiber optic cables are affordable, reliable, secure, and offer higher capacity.

Television and radio broadcasting

While early television and radio signals used electromagnetic waves to transmit signals, cable television companies moved forward using coaxial cables, which carried several analog television signals. As the number of cable TV consumers grew and television networks began to offer more channels and programs, cable operators switched from coaxial cables to optical fibers, from analogue to digital broadcasting.

Medical devices

Medical devices that help doctors look into human bodies without cutting them open were the first applications of fiber optics over 50 years ago. Gastroscopes and arthroscopes are commonplace in medicine today, and fiber optics continues to be an important component in new medical scanning and diagnostic devices.

Military use

Fiber optic cables are cheap, lightweight, high performance, thin, attack-resistant, and very secure. Thus, they provide an easy way to link military bases to missile launch sites and tracking radars. They do not emit electromagnetic radiation easily detectable by the enemy, and they are resistant when subjected to electromagnetic interference.

The relatively light weight of fiber optic cables compared to traditional wires is another advantage. Tanks, military aircraft, and helicopters began switching from metal cables to fiber optic cables. The savings in weight and cost are a big advantage, but fiber optics also increase reliability - their very nature makes them immune to electromagnetic pulse or other interference

We are building a Tier 3 data center using Cisco technologies

In order to get the maximum benefit from the investment, we decided to place our data centers in two highly secure colocation centers in Prague instead of building our own premises. It is a Tier 3 device with 99.982% uptime, which represents an interruption of 1.6 hours per year, and with N + 1 redundancy providing protection against power failure for 72 hours. 

Tier 3 is the highest level of infrastructure available in the Czech Republic. Customers can choose whether they want to use one or both of our data centers. For example, they can place a production environment in one and a disaster recovery backup in the other, or simply place everything in one location. In any case, they will receive highly available IaaS fully managed by Cloud4com with lightning-fast disaster recovery. 

From the very beginning, we have built our data center infrastructure on Cisco Unified Computing System (UCS) server technology, which is based on the standard Intel x86 architecture and supports both virtual and physical machines. Most importantly, the UCS system has allowed us to use blade servers that we can connect, disconnect and replace during full operation without downtime. 

Launched in 2009 when we launched Cloud4com, the Cisco UCS technology was only two years old, so it was still hot news. Many of our customers demanded its benefits, but without the cost of ownership. But we did not use the price as a differentiator. While renting UCS as part of the IaaS cloud services package cost less, the real advantage of our product was the features of the infrastructure itself, which offered both high availability and a higher level of security ccie data center salary. 

We work with Cisco to build trust

To reassure potential customers, we have emphasized the fact that we own the physical infrastructure and thus guarantee security ourselves. No one outside Cloud4com has access to our customers' cloud applications and data. This reassured especially IT managers who were still afraid of spying from times past. 

However, our partnership with Cisco is not limited to UCS. We recently upgraded the switches by moving from the Cisco Nexus 5000 Series to the 9000 Series, increasing throughput to 400 Gbps tenfold. We also use Cisco ASR 1000 aggregation routers to aggregate and encrypt network traffic, CSR 1000V cloud service routers to connect customers to our cloud, and Cisco ASA adaptive security devices for firewalls and network security applications. 

We operate almost exclusively on Cisco technologies and are one of its largest customers in the country. We used its technology to educate the Czech IT community and taught it to perceive and appreciate the benefits of cloud technologies and IaaS. To build a successful and scalable cloud IaaS solution, for us it meant to automate every process that is possible and to actively monitor the occurrence of events in the system and its use in real time. In this regard, Cisco's strategy has been a key factor in our success. Its approach is to ensure the availability and control of technologies in a software way, through well-defined APIs. This ensures consistency and speed of service delivery and high availability. It also allows us to provide customers with contractual guarantees of parameters while maintaining the economy of operation. 

In the last five years, we can observe an increase in demand for cloud technologies and IaaS among medium-sized companies. IT and CFOs come to taste the idea of ​​infrastructure as a regular monthly expense, similar to electricity or software licenses. 

Although this shift in attitudes partially stimulated the arrival of cloud services by Amazon and Microsoft, we are still considered a leader and pioneer in the field of IaaS in the Czech Republic.

The Role of the Computer Analyst

The role of the computer analyst is to assess the computer and technical needs of the users of a given computer system as well as the evaluation and implementation of these systems. It coordinates, therefore, the implementation of changes related to data in both development and production environments.

The IT analyst works in the service of private or public organization to correct failures in their information systems if they occur and make them more efficient by seeking suitable solutions and ensuring the quality of their applications.

The latter may have to perform functional analyzes, technical analyzes and analyzes of systems that he manages and develops by designing software of all kinds such as office software, programming software, educational software or software. industrial control. As it can tailor software that will meet specific needs.

The IT analyst also designs any other IT tool for developing IT systems. Then, he advises the leaders of the company for which he works or for which he is a missionary, on the optimization and performance of their systems and networks.

This computer enthusiast performs programming when designing software. He advises and communicates strategic orientations relating to information technologies as well as the massive processing of standardized administrative communications.

Main missions: Computer analyst

Designs, develops, evolves IT systems

Carry out studies on digital and data security;

Monitors management processes and designs IT work tools

Proposes business solutions and performs preliminary studies

Performs a functional analysis of technological infrastructures and networks

Coordinate the implementation of data changes in development and production environments

Technical skills

- In-depth knowledge of computer analysis

- Knows how to carry out diagnostics and detect computer faults

- Software design

- Design of IT tools

- Synthesis capacity

- On the lookout for new technologies

- Proficient in English

Personal qualities

- Sense of analysis

- Rigor

- precision

- Adaptability

- Listen

Evaluating and integrating AWS controls

AWS provides a wide range of information about its IT control environment to customers

through technical papers, reports, certifications, and other third-party attestations. This

documentation helps customers to understand the controls in place, relevant to the

AWS services they use, and how those controls have been validated. This information

also helps customers account for and validate that controls in their extended IT

environment are operating effectively solutions architect salary.

Traditionally, internal and/or external auditors validate the design and operational

effectiveness of controls by process walkthroughs and evidence evaluation. This type of 

Amazon Web Services Amazon Web Services: Risk and Compliance direct observation and verification, by the customer or customer’s external auditor, is

generally performed to validate controls in traditional on-premises deployments.

In the case where service providers are used (such as AWS), customers can request

and evaluate third-party attestations and certifications. These attestations and

certifications can help assure the customer of the design and operating effectiveness of

control objective and controls validated by a qualified, independent third party. As a

result, although some controls might be managed by AWS, the control environment can

still be a unified framework where customers can account for and verify that controls are

operating effectively and accelerating the compliance review process.

Third-party attestations and certifications of AWS provide customers with visibility and

independent validation of the control environment. Such attestations and certifications

may help relieve customers of the requirement to perform certain validation work

themselves for their IT environment in the AWS Cloud.

AWS risk and compliance program

AWS has integrated a risk and compliance program throughout the organization. This

program aims to manage risk in all phases of service design and deployment and

continually improve and reassess the organization’s risk-related activities. The

components of the AWS integrated risk and compliance program are discussed in

greater detail in the following sections.

AWS business risk management

AWS has a business risk management (BRM) program that partners with AWS

business units to provide the AWS Board of Directors and AWS senior leadership a

holistic view of key risks across AWS. The BRM program demonstrates independent

risk oversight over AWS functions. Specifically, the BRM program does the following:

• Performs risk assessments and risk monitoring of key AWS functional areas

• Identifies and drives remediation of risks

• Maintains a register of known risks

To drive the remediation of risks, the BRM program reports the results of its efforts, and

escalates where necessary, to directors and vice presidents across the business to inform business decision-making.

How does network analytics benefit from AI/ML techniques?

Network analytics uses a combination of local and cloud-based AI-driven analytics engines to make sense of all collected data. Using AI and ML, network analytics customizes the network baseline for alerts, reducing noise and false positives while enabling IT teams to identify issues, trends, anomalies, and root causes accurately. AI/ML techniques along with crowdsourced data are also used to reduce unknowns and improve the level of certainty in decision making ciso engineer.

Artificial intelligence (AI)

Artificial intelligence simulates intelligent decision making in computers. Many sources confuse artificial intelligence with machine learning (ML); machine learning is a subset of the many types of applications that result from the field of artificial intelligence.

Machine learning (ML)

Use of ML can improve analytics engines. With ML, the parameters in the decision tree can be improved based on experience (cognitive learning), peer comparison (prescriptive learning), or complex mathematical regressions (baselining).

ML offers large increases in the accuracy of insights and remediation, because with it the decision trees are modified to meet the specific conditions of a network's configuration, its installed hardware and software, and its services and applications.

In cases when an analytics engine may not have enough information to unequivocally identify endpoints, it may use ML to group together endpoints with similar characteristics. These clustering algorithms consider the distance between cluster members, density areas of the data space, and other factors when clustering objects, much like a human would. In many cases, the algorithms cluster more consistently and across many more dimensions than would be feasible for a human. Such clusters may be used by administrators to remove ambiguity and profile endpoints accurately.

ML is a subset of AI, since it gives analytics engines the ability to automatically learn and improve from experience without being explicitly programmed.

Machine reasoning (MR)

When analytics engines are programmed to reason through logical steps, MR is achieved. This capability can enable an analytics engine to navigate through a number of complex decisions to solve a problem or a complex query.

With MR, analytics can compare multiple possible outcomes and solve for an optimal result, using the same process that a human would. This is an important complement to ML.

CCNA Routing and Switching. Basics of Switching and Routing

Annotation

The course is intended for students wishing to build a career in the field of information technology, and can also be useful for professionals with work experience and who want to structure their knowledge. The course prepares for passing the CCNA industrial certification in the direction of "Routing and switching".

The methodological support of the course includes built-in interactive and Flash-scripts, videos, test questions that help to consolidate the passed material. The course provides for the use by students of software packages such as Packet Tracer (new version 7.2.1 with IPv6 support), which allow to consolidate theoretical knowledge using practical scenarios, solving configuration problems and finding problems, errors in the settings of the existing network.

The learning space in the new learning environment - Cisco Netacad, is built on the principle of a social network. Many possible forms of communication: forums, chats, allow students to very flexibly exchange information, initiate discussions, both with the instructor and among themselves, creating an environment for effective learning and collective mutual assistance.

Knowledge and skills obtained as a result of training

Upon completion of the proposed program, students should know and be able to: ccnp switching

Select suitable devices (hub, switch or router) according to the requirements of your tasks;

Connect routers and switches according to the requirements of the network infrastructure;

Use Cisco software to identify interfaces, protocols, addresses and obtain status information about a network containing several connected Cisco devices;

Configure switches and routers to support specified services and protocols used on the network;

Configure switches for efficient operation of the Spanning Tree Protocol (STP);

Configure static IP routing tables;

Configure access control lists according to the specified requirements for controlling access to devices and the requirements of network traffic in general;

Configure rules for translation of network addresses using Network Address Translation (NAT) technology;

Check the compliance of routers and switches and their network services with the specified requirements;

Use tools to identify the sources of network faults and resolve them.

Courses in the development of which the acquired knowledge will help

CCNA Routing and Switching. Building scalable networks