R

Rakesh Kumar • 28.44K Points
Instructor II 

Q. Agreement between communication devices are called

(A) transmission medium
(B) channel
(C) protocol
(D) modem
Correct : Option (C)

Explanation: 
 protocol is a set of rules that looks after data communication, by acting as an agreement between communication devices. channel is the transmission medium or the path through which information travels. modem is a device that modulates and demodulates data.

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