Circuit Switching
In circuit switching, the bandwidth or network resources are divided into pieces and a bit delay is constant during a connection.
One of the examples of circuit switching is Telephone System Networks. Time Division Multiplexing or TDM and Frequency Division Multiplexing or FDM are the two methods of multiplexing multiple signals into a single carrier.
Time Division Multiplexing
It is a method of transmitting and receiving independent signals over a common signal path via synchronization of switches at the end of the transmission line.
It is used for long-distance communication and is also known as a digital circuit switch.
Frequency Division Multiplexing
FDM is used when multiple data signals are combined for continuous transmission through a shared communication medium.
In this, the total bandwidth is divided into a series of non-overlapping frequency sub-hands.
Advantages of circuit switching:
- There is no delay in data flow.
- There is a committed transmission channel established between the computers that give a guaranteed data rate.
Disadvantages of circuit switching:
- Takes a long time to establish a connection.
- Requires more bandwidth.
- Cannot be used to transmit other data even if the channel is free.
Circuit Switching