Give some real life example of multiplexing....
In telecommunications and computer networks, multiplexing (sometimes contracted to muxing) is a method by which multiple analog or digital signals are combined into one signal over a shared medium. ... For example, in telecommunications, several telephone calls may be carried using one wire.
A traditional television transmitter, which sends a number of channels through a single cable, uses FDM. Wavelength Division Multiplexing is an analog technique, in which many data streams of different wavelengths are transmitted in the light spectrum.