Introduction to Networking for NonStop S-Series Servers

Glossary
Introduction to Networking for HP NonStop S-Series Servers—520670-005
Glossary-12
line interface module (LIM)
line interface module (LIM). The part of a line interface unit (LIU) that provides the
electrical interface. See line interface unit (LIU).
line interface unit (LIU). A dual-ported unit consisting of two parts: a communications line
interface processor (CLIP) and a line interface module (LIM). An LIU can communicate
with either the primary or the backup processor, providing fault-tolerance. When it is a
component of the communications subsystem, an LIU communicates with either
processor through either of a pair of communications interface units (CIUs).
local area network (LAN). A network that is located in a small geographical area and
whose communication technology provides a high-bandwidth, low-cost medium to
which low-cost nodes can be connected. One or more LANs can be connected to the
system such that the LAN users can access the system as if their workstations were
connected directly to it.
local bridge. A device that connects different kinds of local area networks (LANs) in the
same geographical location. See also bridge, and contrast with remote bridge.
Logical Link Control (LLC). A subset of Layer 2 of the Open Systems Interconnection
(OSI) Reference Model, responsible for reliable transfer of information between nodes,
usually on a local area network (LAN). The IEEE 802.2 standard defines two types of
LLC, one connectionless and the other connection-oriented.
logical unit (LU). A port through which a user or an application gains access to the services
of an IBM Systems Network Architecture (SNA) network.
LU. See logical unit (LU).
MAC. See Measure.
management. Monitoring and control of system resources, including configuration,
availability, and quality of service (including security and performance).
management application. An application process that manages the operation of one or
more systems or subsystems. See also management.
management interface. A means by which a person or program manages the operation of
one or more systems or subsystems. See also management.
management model. The approach taken and the mechanisms used to support such tasks
as resource control, resource inquiry, and fault management. See also management.
management process. An HP process through which an application issues commands to a
subsystem. It can be part of one subsystem or can be associated with more than one
subsystem. The Subsystem Control Point (SCP) is the management process for all
communications subsystems that support Distributed Systems Management (DSM).
manager process. An HP subsystem process that performs management services; a
process with which the Subsystem Control Point (SCP) management process