Protocol (computing) means a set of rules.
In computing, a protocol is a convention or standard that controls or enables the connection, communication, and data transfer between two computing endpoints. In its simplest form, a protocol can be defined as the rules governing the syntax, semantics, and synchronization of communication.
At the lowest level, a protocol defines the behavior of a hardware connection. Protocols may be implemented by hardware, software, or a combination of the two.
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