Computer Networking
Demodulation is a process of

converting digital to analog signals
performing data description.
converting analog to digital signals
multiplexing various signals into one high speed line signals

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Computer Networking
CSMA (Carrier Sense Multiple Access) is

network access standard for connecting stations to a circuit-switched network
None of these
a method of determining which device has access to the transmission medium at any time
a very common bit-oriented data link protocol issued by ISO.
a method access control technique for multiple-access transmission media.

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