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Computer Networks

Karnataka Board · Class 12 · Computer Science

Quick revision notes for Computer Networks — Karnataka Board Class 12 Computer Science. Key concepts, formulas, and definitions for last-minute revision.

44 questions24 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

1

Introduction to Computer Networks

  • A computer network is an interconnection among two or more computers or computing devices
  • Networks allow computers to share data and resources among each other
  • Data in networks is divided into smaller chunks called packets
2

Evolution of Networking

  • ARPANET (1960s) - first computer network by U.S. Department of Defence
  • 1969: First message between UCLA and Stanford Research Institute
  • 1971: Roy Tomlinson develops email and @ symbol
3

Types of Networks

  • Networks classified by geographical area and data transfer rate
  • PAN (Personal Area Network) - within 10 metres, personal devices
  • LAN (Local Area Network) - single building/campus, high speed (10-1000 Mbps)
4

Network Devices

  • Modem: MOdulator-DEModulator, converts analog to digital signals
  • Ethernet Card/NIC: Network Interface Card with unique MAC address
  • RJ45: 8-pin connector for Ethernet cables

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Full Notes

Key Concepts

An interconnection among two or moreNetworks are classified as PAN (PersonalEssential components including Modem (analogPhysical or logical arrangement of networkA unique 48

Frequently Asked Questions

What are the important topics in Computer Networks for Karnataka Board Class 12 Computer Science?
Computer Networks covers several key topics that are frequently asked in Karnataka Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Computer Networks — Karnataka Board Class 12 Computer Science?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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