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'''Protocol''' in its most basic meaning is the set of [[rules]] to use when dealing with a particular entity. These rules cover such items as proper clothing, who speaks first and what title is used, who may sit or stand , and whos chair may be higher.
The term is used in computer [[communications]] and refers to the rules for communicating between two devices. The protocol defines what [[signalling]] is used and what each device is expected to do in any circumstance.
An example of a communications protocol is TCP/IP. This is actually two protocols Internet Protocol (IP) and Transmission Control Protocol (TCP). TCP/IP is the basis of the internet.
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