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Upper Layer Protocol

   Also found in: Acronyms, Wikipedia 0.04 sec.
(protocol)Upper Layer 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 lower layer protocols to provide users with basic network services.

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


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Since NPUs only process packets, they are unaware of upper layer protocol data units (PDUs) that run on top of the packet stream.
A new breed: IP SANs show great promise for networked storage. ... by Strickland, Mike / Computer Technology Review
iChip also includes upper layer protocols like SMTP, POP3 and MIME for sending and receiving textual and binary emails; an HTTP server and client; FTP and Telnet clients.
New Connect One Device Servers Add Functionality, WiFi and Wired LAN ... by Business Wire
The limitations outlined above could be rectified through the use of FICON as an Upper Layer Protocol (ULP) in Fibre Channel SANs.
Crossing The ESCON/SAN Border? by Farley, Marc / Computer Technology Review
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