Computer Networking
Communication network is

one or more conductors that serve as a common connection for a related group of devices
None of these
the condition with two or more stations attempt to use the same channel at the same time
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

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Computer Networking
A WATS arrangement

is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
is always less expensive than flat-rate service
is never less expensive than flat-rate service
is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
None of these

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Computer Networking
Terminals are required for

realtime, distributed processing, and manager inquiry
realtime, timesharing, and message switching
realtime, timesharing, and distributed processing
realtime, batch processing, and timesharing
None of these

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