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
network access standard for connecting stations to a circuit-switched network
None of these
a method of determining which device has access to the transmission medium at any time

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Computer Networking
Which of the following technique is used for encapsulation?

a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame.
All of these
None of these
a technique used in best-effort delivery systems to avoid endlessly looping packets.
One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size

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