What is a virtual circuit network? Explain frame relay as a virtual circuit-wide area network.


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Virtual Circuit is the computer network providing connection-oriented service. It is a connection-oriented network. In a virtual circuit, resources are reserved for the time interval of data transmission between two nodes. This network is a highly reliable medium of transfer. Virtual circuits are costly to implement.

- Hamro CSIT

Working of Virtual Circuit:

  • In the first step, a medium is set up between the two end nodes.
  • Resources are reserved for the transmission of packets.
  • Then a signal is sent to the sender to tell the medium is set up and transmission can be started.
  • It ensures the transmission of all packets.
  • A global header is used in the first packet of the connection.
  • Whenever data is to be transmitted a new connection is set up.
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