The mask can, for example, indicate a subnetwork portion of a larger network. Address Resolution Mapping of an IP address to a machine's physical address. ARP is a protocol used to correlate an IP address to a machine's physical address. Address Space A range of memory addresses available to an application program. ARPA was an agency funded by the U.S. federal government originally for pure research.
Agents can also send trap messages.
The U.S. body responsible for setting standards. The highest layer in the OSF model. It establishes communications rights and can initiate a connection between two applications. A set of routines available to developers and applications to provide specific services used by the system, usually specific to the application's purpose. They act as access methods into the application.