Quick Reference Guide

292 Glossary
ID
Abbreviation for identifier, commonly used when
referring to a user identifier (user ID), object identifier
(object ID), or hardware identifier (controller ID).
IDE
Abbreviation for Integrated Drive Electronics. IDE is
a computer system interface, used primarily for hard
drives and CDs.
I/O
Abbreviation for input/output. The keyboard is an
input device, and a printer is an output device. In
general, I/O activity can be differentiated from
computational activity. For example, when a program
sends a document to the printer, it is engaging in
output activity; when the program sorts a list of terms,
it is engaging in computational activity.
IHV
Abbreviation for independent hardware vendor. IHVs
often develop their own MIBs for components that they
manufacture.
interlacing
A technique for increasing video resolution by only
updating alternate horizontal lines on the screen.
Because interlacing can result in noticeable screen
flicker, most users prefer noninterlaced video
adapter resolutions.
internal microprocessor cache
An instruction and data cache built in to the
microprocessor. The Intel Pentium microprocessor
includes a 16-KB internal cache, which is set up as an
8-KB read-only instruction cache and an 8-KB read/write
data cache.
IP address
Abbreviation for Internet Protocol address. See TCP/IP.
IPMB
Abbreviation for intelligent platform management bus,
which is a bus used in systems management technology.
IPMI
Abbreviation for Intelligent Platform Management
Interface, which is a part of systems management
technology.
IPX
Abbreviation for internetwork packet exchange.
IRQ
Abbreviation for interrupt request. A signal that data
is about to be sent to or received by a peripheral device
travels by an IRQ line to the microprocessor. Each
peripheral connection must be assigned an IRQ number.
For example, the first serial port in your system
(COM1) is assigned to IRQ4 by default. Two devices
can share the same IRQ assignment, but you cannot
operate both devices simultaneously.
ISA
Acronym for Industry-Standard Architecture. A 16-bit
expansion bus design. The expansion-card connectors
in an ISA system are also compatible with 8-bit ISA
expansion cards.
ISV
Abbreviation for independent software vendor.
ITE
Abbreviation for information technology equipment.
Java
A cross-platform programming language developed by
Sun Microsystems.
JSSE
Abbreviation for Java Secure Socket Extension.
jumper
Jumpers are small blocks on a circuit board with two or
more pins emerging from them. Plastic plugs
containing a wire fit down over the pins. The wire
connects the pins and creates a circuit. Jumpers provide
a simple and reversible method of changing the
circuitry in a printed circuit board.