Computer Networking
Demodulation is the process of

combining many low speed channels into one high speed channel
converting analog signals to digital signals
None of these
dividing the high-speed signals into frequency bands
converting digital signals to analog signals

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

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

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