Computer Networking
Synchronous protocols

transmit characters one at a time
are more reliable
are generally used by personal computers
None of these
allow faster transmission than asynchronous protocols do

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

a very common bit-oriented data link protocol issued by ISO.
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
None of these

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