Computer Networking
A form of modulation In which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal, is known as

Amplitude modulation
None of these
Angle modulation
modem
Aloha

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Computer Networking
Baseband is

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

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Computer Networking
A front-end processor is

a processor in a large-scale computer that executes operating system instructions
a minicomputer that relieves main-frame computers at a computer centre of communications control functions
preliminary processor of batch jobs.
None of these
a user computer system

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