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Computing (FOLDOC) dictionary
Upper Layer Protocol
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protocol 1. (ULP, or upper-layer protocol)
Any protocol residing in OSI layers five or above.
The Internet protocol suite includes many upper layer
protocols representing a wide variety of applications
e.g. FTP, NFS, RPC, and SMTP. These and other network
applications use the services of TCP/IP and other lowerlayer protocols to provide users with basic network services.