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

Teleport
Concentrator
Modem
Multiplexer
None of these

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Computer Networking
The main difference between synchronous and asynchronous transmission is

None of these
the pulse height is different.
the clocking is mixed with the data in asynchronous transmission
the clocking is derived from the data in synchronous transmission
the bandwidth required is different

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Computer Networking
Carrier is

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

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