Computer Networking
What is the name of the device that converts computer output into a form that can be transmitted over a telephone line?

Modem
Teleport
Multiplexer
Concentrator
None of these

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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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