Question

Which of the following would not be specified in a communication protocol?

Answer 1

Since the options are not given, I am giving an idea about Communication Protocol.

In telecommunications, a communication protocol is a system of rules that allow two or more entities of a communications system to transmit information via any kind of variation of a physical quantity.

The protocol defines the rules syntax, semantics and synchronization of communication, timing, and other possible error recovery methods.

Answer 2

well, it seems you didnot provide the options , but i may help out.
Communication protocol is actually about the rules which enables communication system to transfer the information with the help of physical quantity's variation using the two or more than two entities .
The role which are defined are following 1)semantics    2)syntex
3) , timing      4)synchronization of communication  5) error recover method(optional).
Using well defined protocols or formats the communication system can exchange different messages.