Multiplexing FDM WDM TDM

Multiplexing FDM WDM TDM

What is the purpose of multiplexing? What are the three major multiplexing techniques?

Multiplexing

Whenever the bandwidth of a medium linking two devices is greater than the bandwidth needs of the devices,then the link can be shared.

Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single data link.

Advantages(purpose) of Multiplexing :   Efficient utilization of bandwidth

Three Major Multiplexing Techniques

   1.    Frequency Division Multiplexing  (FDM)
   2.    Wave Division Multiplexing  (WDM)
   3.    Time Division multiplexing  (TDM)

Frequency Division Multiplexing  (FDM) and Wave Division Multiplexing  (WDM) are analog techniques, where as Time Division Multiplexing is digital.