Основы компьютерных сетей from Coursera

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Общие сведения о компьютерных сетях

Добро пожаловать! "Основы компьютерных сетей" – второй курс программы сертификации для специалистов IT-поддержки. В рамках первой недели вы получите общее представление об организации сетей. Мы изучим сетевые модели TCP/IP и OSI, а также посмотрим, как их уровни взаимодействуют друг с другом. Вы познакомитесь с основными сетевыми устройствами: кабелями, хабами, коммутаторами, маршрутизаторами, серверами и клиентами. Мы также поговорим о физическом и канальном уровнях нашей сетевой модели более подробно. К концу этого модуля вы будете представлять себе, как разные уровни модели вместе образуют сеть.

СЕТЕВОЙ УРОВЕНЬ

В рамках второй недели мы более подробно рассмотрим сетевой уровень. Вы познакомитесь с IP-адресацией и организацией подсетей. Мы узнаем, как выполняется инкапсуляция и как различные протоколы, например ARP, позволяют уровням сети взаимодействовать друг с другом. Мы рассмотрим маршрутизацию, ее протоколы, а также принципы работы интернета. К концу этого модуля вы сможете объяснить схему IP-адресации и процесс организации подсетей, научитесь выполнять двоичные вычисления для описания подсетей и будете понимать, как работает интернет.

Транспортный и прикладной уровни

В рамках третьей недели мы более подробно рассмотрим транспортный и прикладной уровни. К концу этого модуля вы сможете описать порты и сокеты TCP, назвать компоненты заголовка TCP, объяснить, чем отличаются протоколы с установлением соединения от протоколов без установления соединения, и рассказать, как TCP обеспечивает целостность данных.

Сетевые службы

Четвертая неделя курса посвящена сетевым службам. Мы узнаем, зачем нужна система DNS и как она работает. Ещё мы поговорим о том, как протокол DHCP упрощает администрирование сетей. К концу этого модуля вы сможете описать принципы работы DNS и DHCP, рассказать, как технологии NAT повышают безопасность сетей, а VPN и прокси-службы помогают пользователям подключаться к сети и защищают их.

Подключение к интернету

На пятой неделе курса мы изучим историю интернета: проследим его эволюцию и посмотрим, что он собой представляет сегодня. Мы разберем различные способы подключения к интернету с помощью кабелей, беспроводных и сотовых соединений, а также волоконной связи. К концу этого модуля вы сможете назвать компоненты глобальных сетей, а также описать беспроводные и сотовые подключения.

Устранение неполадок и будущее компьютерных сетей

Поздравляем! Вы дошли до последней недели курса! Здесь мы поговорим о будущем компьютерных сетей, а также посмотрим, как именно устранять сетевые неполадки в основных операционных системах. К концу этого модуля вы сможете обнаружить и исправить самые частые проблемы с подключением к сети, используя специальные инструменты в Microsoft Windows, macOS и Linux.

Good to know

Know what's good

, what to watch for

, and possible dealbreakers

Углубит базовые знания компьютерных сетей для начинающих специалистов

Предоставляет реальные примеры сетей и сетевых инструментов, что даёт возможность легче понять материал

Изучает сетевые технологии, которые активно используются в реальном мире

Подходит для действующих специалистов, которые хотят систематизировать знания в области сетей

Подойдет для подготовки к собеседованию в области ИТ

Предложенный курс является частью программы сертификации для специалистов ИТ-поддержки

Reviews summary

In-depth introduction to computer networking

This course provides a comprehensive introduction to computer networking, covering the fundamentals of network technologies and protocols, cloud services, and troubleshooting techniques. Students highly recommend this course for its clear explanations, engaging format, and practical relevance.

Interactive and engaging

"The course is very engaging and interactive."

Well-explained concepts

"The course materials are very well-explained and easy to understand."

Real-world applications

"I found the course to be very practical and relevant to my work."

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Основы компьютерных сетей with these activities:

Organize and review course materials regularly

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Organize your class notes and materials for effective studying and long-term retention.

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Attend all lectures and take comprehensive notes.
Review your notes regularly and summarize key concepts.
Organize your notes and materials using a system that works for you, such as digital folders or a physical notebook.

Review electrical engineering fundamentals

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Electrical engineering fundamentals are essential for this course, go over basic concepts now.

Browse courses on Ohm's Law

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Review basic electrical concepts such as voltage, current, and resistance.
Practice solving simple electrical circuits using Ohm's Law and Kirchhoff's Laws.

Form a study group with classmates

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Collaborative learning improves understanding and retention of concepts.

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Identify classmates who are interested in forming a study group.
Establish regular meeting times and a study plan.
Work together to review course materials, discuss concepts, and complete assignments.

Six other activities

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Configure a basic network using network simulation software

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Network simulation helps solidify your grasp on networking concepts.

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Design a basic network topology using a network simulation software.
Configure IP addresses, subnet masks, and default gateways for devices in the network.
Verify network connectivity using ping and traceroute commands.

Attend a workshop on advanced network security

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Attending this workshop will expose you to advanced network security concepts and trends.

Browse courses on network security

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Identify and register for a workshop on advanced network security.
Attend the workshop and actively participate in discussions and exercises.

Participate in a network security competition

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Participating in competitions challenges your skills.

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Identify and register for a network security competition.
Prepare for the competition by practicing your skills and studying relevant materials.
Participate in the competition and demonstrate your abilities.

Build a portfolio of network troubleshooting case studies

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This extended project will allow you to apply troubleshooting skills and build a valuable portfolio piece.

Browse courses on Network Troubleshooting

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Identify common network issues and document the troubleshooting steps taken to resolve them.
Create a portfolio of case studies that demonstrate your troubleshooting skills and knowledge.

Contribute to open-source network security tools

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Contribute to open-source projects and gain real-world experience.

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Identify open-source network security tools that align with your interests.
Review the documentation and codebase.
Identify areas where you can contribute, such as bug fixes or feature enhancements.

Design and implement a network security plan for a small business

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Creating a network security plan is a practical way to apply your knowledge and skills.

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Identify the security requirements and risks for a small business.
Design a network security plan that addresses the identified risks.
Implement the network security plan and monitor its effectiveness.

Career center

Learners who complete Основы компьютерных сетей will develop knowledge and skills that may be useful to these careers:

Computer Network Architect

A Computer Network Architect designs, builds, and maintains computer networks. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers network troubleshooting and maintenance, which are essential skills for a Computer Network Architect.

See salaries and explore the career path for Computer Network Architect

Network Administrator

A Network Administrator is responsible for the day-to-day operation and maintenance of a computer network. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers network troubleshooting and maintenance, which are essential skills for a Network Administrator.

See salaries and explore the career path for Network Administrator

Cloud Engineer

A Cloud Engineer designs, builds, and maintains cloud-based applications and services. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers cloud computing topics, which are essential for a Cloud Engineer.

See salaries and explore the career path for Cloud Engineer

Network Engineer

A Network Engineer designs, builds, and maintains computer networks. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers network troubleshooting and maintenance, which are essential skills for a Network Engineer.

See salaries and explore the career path for Network Engineer

Systems Administrator

A Systems Administrator is responsible for the day-to-day operation and maintenance of computer systems. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers system administration topics, which are essential for a Systems Administrator.

See salaries and explore the career path for Systems Administrator

IT Support Specialist

An IT Support Specialist provides technical support to users of computer systems. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers IT support topics, which are essential for an IT Support Specialist.

See salaries and explore the career path for IT Support Specialist

Data Center Technician

A Data Center Technician maintains and repairs computer equipment in a data center. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers data center operations, which are essential for a Data Center Technician.

See salaries and explore the career path for Data Center Technician

Network Security Analyst

A Network Security Analyst protects computer networks from unauthorized access and attacks. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers network security topics, which are essential for a Network Security Analyst.

See salaries and explore the career path for Network Security Analyst

Software Engineer

A Software Engineer designs, develops, and maintains software applications. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers software engineering topics, which are essential for a Software Engineer.

See salaries and explore the career path for Software Engineer

Database Administrator

A Database Administrator maintains and manages databases. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers database administration topics, which are essential for a Database Administrator.

See salaries and explore the career path for Database Administrator

Web Developer

A Web Developer designs, develops, and maintains websites. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers web development topics, which are essential for a Web Developer.

See salaries and explore the career path for Web Developer

Business Analyst

A Business Analyst analyzes and designs business processes. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers business analysis topics, which are essential for a Business Analyst.

See salaries and explore the career path for Business Analyst

Information Security Analyst

An Information Security Analyst protects computer systems from unauthorized access and attacks. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers information security topics, which are essential for an Information Security Analyst.

See salaries and explore the career path for Information Security Analyst

Computer Systems Analyst

A Computer Systems Analyst analyzes and designs computer systems. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers computer systems analysis topics, which are essential for a Computer Systems Analyst.

See salaries and explore the career path for Computer Systems Analyst

Computer Programmer

A Computer Programmer writes and maintains computer programs. This course may be useful, as it provides a foundation in computer networking concepts, including network models, protocols, and technologies. The course also covers computer programming topics, which are essential for a Computer Programmer.

See salaries and explore the career path for Computer Programmer

Основы компьютерных сетей

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Reviews summary

In-depth introduction to computer networking

Activities

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