Computer Networking
What is the purpose of flow control?

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.
To ensure that data is retransmitted if an acknowledgment is not received.

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

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

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