Packet Switching Virtual Circuit Approach || Lesson 54 || Computer Networks || Learning Monkey ||

Packet Switching Virtual Circuit Approach
We will try to understand Packet Switching Virtual Circuit Approach in this class.
We have already discussed the concept of the datagram approach in our previous class.
Packet Switching Virtual Circuit Approach
The virtual-circuit approach will create a circuit before transmitting the data, unlike the datagram approach.
The entire switching of the virtual-circuit approach happens in three different phases.
Setup phase
Data transfer phase
Tear down phase
Setup Phase:
A virtual circuit will get established between the source and destination in the setup phase.
The source system will transmit a request packet to the destination to establish the circuit.
In response, the destination system will transmit an ‘acknowledge packet’ to the source system.
Data transfer phase:
After establishing the connection between the source and destination, the source system will transfer the data to the destination.
Tear down phase:
After transferring all the packets in the data transfer phase, the source will send a special packet to tear down the established connection.
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