| Upper Layer Protocol 1. (ULP, or upper-layer protocol) Any residing in layers five or above. The protocol suite includes many upper layer protocols representing a wide variety of applications e.g. , , , and . These and other network applications use the services of and other 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 . (1999-02-17) |