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Computer Networks — Revision Notes

Chhattisgarh Board · Class 12 · Computer Science

Computer Networks revision notes for Chhattisgarh Board Class 12 Computer Science: 4 topics in quick points. Includes Basics of Computer Networks.

44 questions92 flashcards5 concepts

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A diagram showing how a repeater extends the range of a communication system by receiving, amplifying, and retransmitting signals.
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Key Topics to Revise

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1. Basics of Computer Networks

  • A network is a group of two or more similar things or people interconnected with each other.
  • A computer network is an interconnection among two or more computers or computing devices.
  • A network allows sharing of data and resources such as printers and storage.
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2. Evolution of Networking

  • ARPANET was a 1960s U.S. Department of Defence research project.
  • ARPANET connected academic and research institutions for scientific collaboration.
  • The first message was communicated between UCLA and Stanford Research Institute.
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3. Types of Networks

  • Computer networks are broadly classified as PAN, LAN, MAN, and WAN.
  • PAN covers about 10 metres.
  • A mobile phone connected to a laptop through USB forms a wired PAN.
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4. Networking Devices

  • Common networking devices include modem, Ethernet card or NIC, RJ45, repeater, hub, switch, router, and gateway.
  • A modem converts between analog signals and digital bits.
  • The sender's modem modulates digital data into analog signals.

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Full Notes

Key Concepts

A network is a groupARPANET was a 1960s UPANModem stands for MOdulator DEModulatorAn Ethernet card

Frequently Asked Questions

What are the important topics in Computer Networks for Chhattisgarh Board Class 12 Computer Science?
Key topics in Computer Networks include Basics of Computer Networks, Evolution of Networking, Types of Networks, Networking Devices. Study these first, then practise questions on each for the Chhattisgarh Board Class 12 board exam.
How should I revise Computer Networks for the Chhattisgarh Board Class 12 board exam?
Learn the core ideas first, then work through the 44 practice questions on Computer Networks. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All Chhattisgarh Board Class 12 Computer Science Revision Notes

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