Subnetwork Access Protocol

• abstract: The Open Systems Interconnect (OSI) model uses a SAP ("SAP", pronounced like the sap that comes from a tree to make maple syrup) to define the communication between layers (like Network, Transport, Session, and the other layers of the Seven-Layered Model), that is to identify which protocol should process an incoming message. Within a given layer, programs can exchange data by a mutually agreed upon protocol mechanism.

以上来源于: WordNet