Computer Networking
Demodulation is a process of

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

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Computer Networking
HMP (Host Monitoring Protocol) is:

a protocol that handles error and control messages
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
None of these
a protocol used to monitor computers
a TCP/IP high level protocol for transferring files from one machine to another.

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