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Computer Fundamentals by Anita Goel

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9

DATA COMMUNICATION AND COMPUTER NETWORK

Contents

  • Importance of networking—Resource sharing, information sharing, as a communication medium, back-up and support
  • Data transmission media—Twisted pair, coaxial cable, optical fiber, RF transmission, microwave transmission, satellite transmission
  • Data transmission across media
    • Transmission modes—Simplex, halfduplex, full-duplex
    • Transmission speed—Bandwidth, throughput, attenuation, distortion
    • Fundamentals of transmission— Electromagnetic waves, signals
      • Analog and digital signals
      • Modulation and demodulation— Amplitude, frequency, phase shift
      • Multiplexing—FDM, WDM
      • Asynchronous and synchronous transmission
  • Data transmission and data networking
    • Switching—Circuit switching, message switching, ...

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