The designation communication protocol simply states that a communication between two protocol data units( PDU) takes place on equal protocol layers. The name communication protocol does not indicate which layer of the OSI reference model is used for the communication. Nor does it indicate which switching technology is used or which security and time-critical aspects are taken into account.
The term communication protocol applies equally to all protocols used in communication: transport protocols, network protocols or application protocols. Communication protocols support connection-related procedures, such as packetization, as well as the transmission and delivery of messages.