Subnetwork Access Protocol. A TCP/IP protocol that specifies a standard method for encapsulation of IP datagrams and ARP messages.

Subnetwork Access Protocol. Internet protocol that operates between a network entity in the subnetwork and a network entity in the end system. SNAP specifies a standard method of encapsulating IP datagrams and ARP messages on IEEE networks. The SNAP entity in the end system makes use of the services of the subnetwork and performs three key functions: data transfer, connection management, and QOS selection.

(Sub Network Access Protocol): A SNAP header consists of 5 bytes, three bytes of OUI (Organizationally Unique Identifier) and 2 bytes of PID (Protocol IDentifier). The OUI defines which organization administers the PID that follows. The value of 000000h in the OUI means that the PID is defined as an EtherType.

See subnetwork access protocol.

SubNetwork Access Protocol is used when a SAP definition does not exist for the encapsulated user data protocol.

Subnetwork Access Protocol. A version of the IEEE local area network logical link control frame similar to the data link level transmission frame that allows the use of nonstandard higher-level protocols.