IBM 865741Y Handbook - Page 259

performed by a microprocessor, and that identifies data involved in the operation. Internet Protocol (IP). A protocol used to route data from its source to its destination in an Internet environment. interrupt level. The means of identifying the source of an interrupt, the function requested by an interrupt, or the code or feature that provides a function or service. I/O. Input/output. IRQ. Interrupt request. ISA. Industry standard architecture ISO. International Organization for Standardization. An organization of national standards bodies from various countries established to promote development of standards to facilitate international exchange of goods and services, and develop cooperation in intellectual, scientific, technological, and economic activity. J jumper. A connector between two pins on a network adapter that enables or disables an adapter option, feature, or parameter value. L LAN. Local area network. LAN multicast. Sending of a transmission frame that is intended to be accepted by a group of selected data stations on the same local area network. (T) LED. Light-emitting diode. load. To bring all or part of a computer program into memory from auxiliary storage so that the computer can run the program. local area network (LAN). (1) A computer network located on a user's premises within a limited geographical area. Communication within a local area network is not subject to external regulations; however, communication across the LAN boundary may be subject to some form of regulation. (T) (2) A network in which a set of devices are connected to one another for communication and that can be connected to a larger network. logical. (1) Pertaining to content or meaning as opposed to location or actual implementation. (A) (2) Pertaining to a view or description of data that does not depend on the characteristics of the computer system or the physical storage. (A) (3) Contrast with physical. (A) LUN. Logical unit number. Glossary 241