Computer Networking
The application layer of a network

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

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Computer Networking
HDLC (High-level Data Link Control) is

None of these
a method access control technique for multiple-access transmission media
a method of determining which device has access to the transmission medium at any time
network access standard for connecting stations to a circuit-switched network
a very common bit-oriented data link protocol issued by ISO.

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Computer Networking
What is a stub network?

A network with more than one exit point.
A network that has only one entry and exit point.
A network with only one entry and no exit point.
A network with more than one exit and entry point.

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