NETWORK GOALS:

NETWORK APPLICATIONS:

  1. Access to remote programs.
  2. Access to remote databases.
  3. Value-added communication facilities.

Calling up a distant computer via a network is cheaper than calling it directly. The lower rate is possible because in a normal telephone call ties up an expensive, dedicated circuit for the duration of the call, whereas access via a network ties up long-distance lines only while data are actually being transmitted.
Reference models
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