Computer Networking
An ROP would be attached to a

full duplex channel
half duplex channel
None of these
duplex channel
simplex channel

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Computer Networking
The application layer of a network

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

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Computer Networking
X.21 is

None of these
network access standard for connecting stations to a circuit-switched network
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
a very common bit-oriented data link protocol issued by ISO

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Computer Networking
What is the purpose of flow control?

To ensure that data is retransmitted if an acknowledgment is not received.
To regulate the size of each segment.
To provide a means for the receiver to govern the amount of data sent by the sender.
To reassemble segments in the correct order at the destination device.

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