Multiplexing (Muxing)
This means combining multiple streams into 1 complex stream, using the same transport medium.
Note: here transport does not refer specifically to transport layer , rather the channel through which we are transporting the information stream. So this could refer to transports in other layers, see: Internet protocol stack / Network stack
Used to share a scarce resource.
To do the reverse: De-Multiplexing To do the inverse: Inverse Multiplexing