SNMP Reference Guide

Glossary 629
TSOP
Acronym for thin small outline package. A very-thin,
plastic, rectangular surface mount chip package with
gull-wing pins on its two short sides. TSOPs are about
a third as thick as SOJ chips.
UART
Acronym for universal asynchronous receiver transmitter,
the electronic circuit that makes up the serial port.
UDP
Acronym for user datagram protocol.
UL
Abbreviation for Underwriters Laboratories.
UMB
Abbreviation for upper memory blocks.
unicode
A fixed width, 16-bit world wide character encoding,
developed and maintained by the Unicode Consortium.
upper memory area
The 384 KB of RAM located between 640 KB and
1 MB. If the computer has an Intel386 or higher
microprocessor, a utility called a
memory manager
can create UMBs in the upper memory area, in
which you can load device drivers and
memory-resident programs.
UPS
Abbreviation for uninterruptible power supply.
A battery-powered unit that automatically supplies
power to your computer in the event of an
electrical failure.
USB
Abbreviation for Universal Serial Bus. A USB connector
provides a single connection point for multiple
USB-compliant devices, such as mice, keyboards,
printers, and computer speakers. USB devices can
also be connected and disconnected while the
system is running.
utility
A program used to manage system resources—memory,
disk drives, or printers, for example.
UTP
Abbreviation for unshielded twisted pair.
UUID
Acronym for Universal Unique Identification.
V
Abbreviation for volt(s).
VAC
Abbreviation for volt(s) alternating current.
varbind
An algorithm used to assign and object identifier or
OID. The varbind gives rules for arriving at the decimal
prefix that uniquely identifies an enterprise, as well as
the formula for specifying a unique identifier for the
objects defined in that enterprise’s MIB.
variable
A component of a managed object. A temperature
probe, for example, has a variable to describe its
capabilities, its health or status, and certain indexes
that you can use to help you in locating the right
temperature probe.
VCCI
Abbreviation for Voluntary Control Council for
Interference.
VCR
Abbreviation for video cassette recorder.
VDC
Abbreviation for volt(s) direct current.
VESA
Acronym for Video Electronics Standards Association.