Computer Networking
Carrier is

None of these
the condition when two or more sections attempt to use the same channel at the same time
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
a continuous frequency capable of being modulated or impressed with a second signal

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Computer Networking
The application layer of a network

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

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