Stephen DeCanio faculty at the UCSB in 1978. From 1986 to '87 he was the Senior Staff Economist at the President's Council of Economic Advisors. He was also a member of the United Nations Environment Programme Economic Options Panel, which reviewed the economic aspects of the Montreal Protocol on Substances that Deplete the Ozone Layer. In 1996 he was awarded the Stratospheric Ozone Protection Award by the United States Environmental Protection Agency and in 2007 he was presented with the Leontief Prize for advancing the frontiers in economic thought by the Global Development and Environment Institute. He participated in the Intergovernmental Panel
Subnetwork Access Protocol necessary to determine which protocol is to be invoked to process a service data unit delivered by the lower layer. The most common reference to SAP, including a Source Service Access Point (SSAP) and a Destination Service Access Point (DSAP) refers to the boundary between the Data Link Layer and the Network Layer. It is common to think of SAP only in terms of its use at Layer 2, specifically in its Logical Link Control (LLC) sub-layer as defined in the IEEE 802.2 standards. Link Service Access Point (LSAP) includes both Destination Service Access Point (DSAP) and Source Service Access