Computer Networking
Carrier is

None of these
a continuous frequency capable of being modulated or impressed with a second signal
a collection of interconnected functional units that provides a data communications service among stations attached to the network
One or more conductors that serve as a common connection for a related group of devices
the condition when two or more sections attempt to use the same channel at the same time

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Computer Networking
A front-end processor is

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

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