A Novell NetWare protocol that is used with Internetwork Packet Exchange (IPX) to enable file and print servers to advertise their availability to clients on a network.
Service Advertising Protocol (SAP) periodically advertises the address of the server and the types of services it can provide to clients. It sends its advertisements by making frequent broadcasts to all machines on the local network. Routers generally forward the advertisements so that network services can be made available to machines throughout an IPX internetwork.
The use of SAP broadcasts on IPX internetworks creates effective limits on the size of a usable IPX internetwork. However, you can configure routers to reduce unnecessary SAP traffic by