Data Communication
Karnataka Board · Class 12 · Computer Science
Quick revision notes for Data Communication — Karnataka Board Class 12 Computer Science. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
11.1 Concept of Communication & Components
- Data Communication = Data + Communication (exchange of data between networked devices)
- Examples of communicating devices: computers, mobile phones, laptops, printers, servers, switches
- Five essential components: Sender, Receiver, Message, Communication Medium, Protocol
11.2 Measuring Capacity of Communication Media
- Channel capacity measured by Bandwidth and Data Transfer Rate
- Higher bandwidth = Higher data transfer rate
- Bandwidth: range of frequencies available for transmission
11.3 Types of Data Communication
- Three types: Simplex, Half-duplex, Full-duplex
- Simplex: One-way communication (keyboard to computer, remote to TV)
- Half-duplex: Two-way but not simultaneous (walkie-talkie)
11.4 Switching Techniques
- Alternative to dedicated connections in large networks
- Two main types: Circuit Switching and Packet Switching
- Circuit Switching: dedicated path established before communication
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Data Communication 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.
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Sources & Official References
- Karnataka SSLC — kseeb.kar.nic.in
- Dept of Pre-University Education, Karnataka
- 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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