Computer Networks
CBSE · Class 12 · Computer Science
Complete topic list for Computer Networks in CBSE Class 12 Computer Science. Key concepts, sub-topics, and what to focus on for board exams.
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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
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
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)
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
Key Concepts
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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