Computer Networking
The difference between a multiplexer and a statistical multiplexer is

Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
Statistical multiplexers need buffers while multiplexers do not need buffers
Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)
Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
None of these

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Computer Networking
Bandlimited signal is

a signal all of whose energy is contained within a finite frequency range
None of these
simultaneous transmission of data to a number of stations
transmission of signals without modulation
All of these

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