Computer Networking
Select the cable that uses copper conductor, accept and transport signals in the form of electric current?

Metallic cable
Fiber-optic cable
All of these
Twisted pair cable

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

None of these
network access standard for connecting stations to a circuit-switched network
a very common bit-oriented data link protocol issued by ISO.
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

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