Computer Networking
A decrease in magnitude of current, voltage, a power of a signal in transmission between points, is known as

Carrier
None of these
Amplitude
Aloha
Attenuation

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

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
a method access control technique for multiple-access transmission media
a very common bit-oriented data link protocol issued by ISO.

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