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Data Communication and Networking

Chapter 12. Data Communication and Networking. Communication. sending or receiving information Beating of drums Mirrors reflecting sunlight Homing pigeons Telegraph, telephone Computers …. Data Communication. Data Communication. DATA COMMUNICATION. Exchange of data between two devices

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Data Communication and Networking

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  1. Chapter 12 Data Communication and Networking

  2. Communication • sending or receiving information • Beating of drums • Mirrors reflecting sunlight • Homing pigeons • Telegraph, telephone • Computers … Data Communication

  3. Data Communication

  4. DATA COMMUNICATION • Exchange of data between two devices • wired or wireless transmission medium • Communication system (collection of hardware, software …)

  5. Five components of a data communication System

  6. Data Transmission Modes

  7. Analog & Digital Transmission

  8. Analog & Digital Transmission … • Analog • Signals- Sine waves • Amplitude • Frequency • Wavelength • Digital

  9. Data Communication Measurement • Narrowband Services • 64 Kbps or less channels • Wideband Services • 1.5 Mbps to 45 Mbps (North American) • 2 Mbps to 34 Mbps (International) • Broadband Services • 45 Mbps or greater (North American) • 34 Mbps or greater (International) • It Changes

  10. Transmission Media

  11. Radio Frequency Propogation

  12. Modulation

  13. Multiplexing

  14. Multiplexing …

  15. Synchronization- Controlling time • Asynchronous Transmission • Each character of data is treated independently • Synchronous Transmission • For sending large blocks of data • Control schemes • Character-oriented • Bit-oriented

  16. Switching • …

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