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This section describes the difference between circuit switching (CS) and packet switching (PS).
PS is used for time insensitive applications such as internet/email/SMS/MMS/VOIP etc. In CS even if user is not talking the channel cannot be used by any other users, this will waste the resource capacity at those intervals.
The example of circuit switched network is PSTN and example of packet switched network is GPRS/EDGE. Following table summarizes difference between circuit switching and packet switching of type datagram and virtual circuit.Circuit Switching
Packet Switching(Datagram type)
Packet Switching(Virtual Circuit type)
Dedicated path
No Dedicated path
No Dedicated path
Path is established for entire conversation
Route is established for each packet
Route is established for entire conversation
Call setup delay
packet transmission delay
call setup delay as well as packet transmission delay
Overload may block call setup
Overload increases packet delay
Overload may block call setup and increases packet delay
Fixed bandwidth
Dynamic bandwidth
Dynamic bandwidth
No overhead bits after call setup
overhead bits in each packet
overhead bits in each packet
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