Upper Layer Protocol


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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 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.
References in periodicals archive ?
The PXI-C664 uses an innovative FPGA-based hardware architecture with multiple embedded processors handling the processing of upper layer protocols to provide an efficient, high-performance solution capable of handling 10/100Mbit/s and 1Gbit/s Ethernet interfaces.
The upper layer protocols used by these applications typically produce a high level of control chatter for each data block, which goes unnoticed on LANs with their short distances and large surplus bandwidth, but becomes painfully obvious over WANs.
But a SNAP operates not only on the network protocol layers but also on the upper layer protocol. Therefore, it cannot depend solely on the network layer to provide data robustness.
The limitations outlined above could be rectified through the use of FICON as an Upper Layer Protocol (ULP) in Fibre Channel SANs.
In transport mode, the ESP header is inserted after the original IP header while protection applies to upper layer protocols. AH is a member of the IPsec protocol suite that provide guaranteed integrity and authentication of the entire original IP datagram including the new IP header.