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Glossary
LAN. See
local-area network
line. The specific hardware path over which data is transmitted or received. A line can also
have a process name associated with it that identifies an input/output process (IOP) or
logical device associated with that specific hardware path.
local-area network (LAN). A network that is located in a small geographical area and whose
communications 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. Contrast with "wide area network (WAN)."
licensed program. A program that has the privileges of the operating system. When a
licensed program runs, privileged operations in it can bypass ordinary security
interfaces.
LIF. See
logical interface
logical device. A process used to communicate with a physical device. Logical devices are
identified by names and numbers; for example, $DISK1.
logical interface (LIF). A process that allows an application or another process to
communicate with data communications hardware.
low PIN. A process identification number (PIN) that can range from 0 through 254. See also
high
PIN.
macro. A sequence of TACL commands and built-in functions that can contain dummy
arguments, thus providing a means for simple argument substitution. When the macro
name is given to TACL, TACL substitutes the command sequence for the macro name
and replaces any dummy arguments with parameter values supplied to TACL. Macros
are used to automate operations tasks.
management application. A program or set of programs that issues commands to
subsystems, retrieves event messages, or does both things, to assist in managing a
system or a network of systems.
Measure. A performance-measurement tool that lets users collect and examine statistics for a
system or network.
MEDIACOM. The operator interface to the Distributed Systems Management/Tape Catalog
(DSM/TC) product and to the STK 4400 Automated Cartridge System (ACS). It can be
used in environments other than DSM/TC. Refer to the DSM/Tape Catalog Operator
Interface (MEDIACOM) Manual for complete documentation on this utility.
mirrored volume. See volume.
network. Two or more computer systems (nodes) connected so that they can exchange
information and share resources.
(LAN).
(LIF).
Guardian User's Guide —425266-001
Glossary -7
LAN
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