Difference between Circuit Switching and Packet Switching
|Circuit Switching||Packet Switching|
|In-circuit switching has there are 3 phases:
i) Connection Establishment.
ii) Data Transfer.
iii) Connection Released.
|In Packet switching directly data transfer takes place.|
|In-circuit switching, each data unit knows the entire path address which is provided by the source.||In Packet switching, each data unit just knows the final destination address intermediate path is decided by the routers.|
|In-Circuit switching, data is processed at the source system only||In Packet switching, data is processed at all intermediate nodes including the source system.|
|The delay between data units in circuit switching is uniform.||The delay between data units in packet switching is not uniform.|
|Resource reservation is the feature of circuit switching because the path is fixed for data transmission.||There is no resource reservation because bandwidth is shared among users.|
|Circuit switching is more reliable.||Packet switching is less reliable.|
|Wastage of resources is more in Circuit Switching||Less wastage of resources as compared to Circuit Switching|
|It is not a store and forward technique.||It is a store and forward technique.|
|Transmission of the data is done by the source.||Transmission of the data is done not only by the source but also by the intermediate routers.|
|Congestion can occur during the connection establishment phase because there might be a case where a request is being made for a channel but the channel is already occupied.||Congestion can occur during the data transfer phase, a large number of packets comes in no time.
|Circuit switching is not convenient for handling bilateral traffic.||Packet switching is suitable for handling bilateral traffic.|
|In-Circuit switching, the charge depends on time and distance, not on traffic in the network.||In Packet switching, the charge is based on the number of bytes and connection time.|
|Recording of packets is never possible in circuit switching.||Recording of packets is possible in packet switching.|
|In-Circuit Switching there is a physical path between the source and the destination||In Packet Switching there is no physical path between the source and the destination|
|Circuit Switching does not support store and forward transmission||Packet Switching supports store and forward transmission|
|Call setup is required in circuit switching.||No call setup is required in packet switching.|
|In-circuit switching each packet follows the same route.||In packet switching packets can follow any route.|
|The circuit switching network is implemented at the physical layer.||Packet switching is implemented at the datalink layer and network layer|
|Circuit switching requires simple protocols for delivery.||Packet switching requires complex protocols for delivery.|
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