Computer Networking
In OSI network architecture, the dialogue control and token management are responsibilities of

network layer
data link layer
None of these
session layer
transport layer

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

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

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