Basic concepts

• Communication protocols (TCP/IP)

• Data transmission methods

  • Asynchronous
  • Synchronous

• Connecting

  • Modem and TCU
  • Hardwired and remote

• Data transmission channels (bps)

  • narrow bands: 5-30
  • voice bands: 1,000-9,600
  • broad bands: 100,000

• Types of communication lines

  • simplex
  • half-duplex
  • duplex

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