Upper Layer Protocol


Upper Layer Protocol

(protocol)1. (ULP, or upper-layer protocol)Any protocol residing in OSI layers five or above.

The Internet protocol suite includes many upper layerprotocols representing a wide variety of applicationse.g. FTP, NFS, RPC, and SMTP. These and other networkapplications use the services of TCP/IP and other lower layer protocols to provide users with basic network services.

2. A protocol higher in the OSI reference model than thecurrent reference point. Upper Layer Protocol is often usedto refer to the next-highest protocol in a particularprotocol stack.