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
None of these
network access standard for connecting stations to a circuit-switched network

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Computer Networking
Which of the following characteristic(s) is/are suited to the PSS applications?

bursty traffic and low communications intensity
widely dispersed terminals and access to international packets switched services
Multiple remote host or applications accessed by a single local access circuit terminal and circuit
All of these
None of these

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