Computer Networking
What is the name given to the exchange of control signals which is necessary for establishing a connection between a modem and a computer at one end of a line and another modem and computer at the other end?

None of these
Duplexing
Modem options
Protocol
Handshaking

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Computer Networking
Carrier is

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

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