NSAP address

A Network Service Access Point address (NSAP address), defined in ISO/IEC 8348, is an identifying label for a Service Access Point (SAP) used in OSI networking.

These are roughly comparable to IP addresses used in the Internet Protocol; they can specify a piece of equipment connected to an Asynchronous Transfer Mode (ATM) network. A specific stream, analogous to a TCP/IP port or socket, is specified by using a Transport Service Access Point (TSAP). ATM can also use a Presentation (PSAP) and Session (SSAP) Access Point, but these may also be unspecified; this is up to the application.