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Revision Notes

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.

50 questions88 flashcards5 concepts

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An illustration showing various computing devices (computer, printer, server, switch) connected to form a network, exchanging data over a communication medium.
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Key Topics to Revise

1

1. Concept of Communication and Components

  • Data communication means exchange of data between two or more networked or connected devices like laptops, PCs, printers, routers, and mobile phones.
  • Data can be text, image, audio, video, or multimedia.
  • Communication is the act of sending or receiving data.
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2. Capacity of Communication Media

  • The capacity of a channel is measured by bandwidth and data transfer rate.
  • Bandwidth of a channel is the range of frequencies available for transmission of data through that channel.
  • Higher bandwidth usually means higher data transfer rate.
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3. Types of Data Communication

  • Data communication is broadly classified into three types: simplex, half-duplex, and full-duplex.
  • Simplex communication is one-way communication.
  • Half-duplex communication is two-way communication, but not at the same time.
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4. Switching Techniques

  • Switching is used to route data through various nodes in a network.
  • Switching creates a temporary route for data transmission.
  • Two commonly used switching techniques are circuit switching and packet switching.

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Full Notes

Key Concepts

Data communication is the exchangeBandwidth is the range of frequenciesData transfer rate is the numberSimplex is oneCircuit switching creates a dedicated path

Frequently Asked Questions

What are the important topics in Data Communication for Karnataka Board Class 12 Computer Science?
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.
How to score full marks in Data Communication — Karnataka Board Class 12 Computer Science?
Understand the core concepts first, then work through the 50 practice questions available for this chapter. Revise formulas and 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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