Computer Networking
The application layer of a network

consists of software being run on the computer connected to the network
None of these
establishes, maintains, and terminates virtual circuits
defines the user's port into the network
All of these

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Computer Networking
Carrier is

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

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