|Circuit Switching||Packet Switching|
|In circuit switching 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 know the entire path address which is provided by the source.||In Packet switching, each data unit just know the final destination address intermediate path is decided by the routers.|
|In Circuit switching, data is processed at source system only||In Packet switching, data is processed at all intermediate node including source system.|
|Delay between data units in circuit switching is uniform.||Delay between data units in packet switching is not uniform.|
|Resource reservation is the feature of circuit switching because 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 are 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 connection establishment time, there might be a case will requesting for channel the channel is already occupied.||Congestion can occur during data transfer phase, 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, charge depend on time and distance, not on traffic in the network.||In Packet switching, charge is based on the number of bytes and connection time.|
|Recording of packet is never possible in circuit switching.||While recording of packet is possible in packet switching.|
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