Users Guide

138 Glossary
numbers from 0 through 16, for example, is expressed
in hexadecimal notation as: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A,
B, C, D, E, F, 10. In text, hexadecimal numbers are
often followed by h.
HBA
Abbreviation for host bus adapter. A PCI adapter card
that resides in the system whose only function is to
convert data commands from PCI-bus format to
storage interconnect format (examples: SCSI, Fibre
Channel) and communicate directly with hard drives,
tape drives, CD drives, or other storage devices.
HTTP
Abbreviation for Hypertext Transfer Protocol. HTTP
is the client-server TCP/IP protocol used on the World
Wide Web for the exchange of HTML documents.
HTTPS
Abbreviation for HyperText Transmission Protocol,
Secure. HTTPS is a variant of HTTP used by Web
browsers for handling secure transactions. HTTPS is a
unique protocol that is simply SSL underneath HTTP.
You need to use "https://" for HTTP URLs with SSL,
whereas you continue to use "http://" for HTTP URLs
without SSL.
ICES
Abbreviation for Interface-Causing Equipment
Standard (in Canada).
ICMP
Abbreviation for Internet Control Message Protocol.
ICMP is a TCP/IP protocol used to send error and
control messages.
ICU
Abbreviation for ISA Configuration Utility.
ID
Abbreviation for identification.
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.
IP address
Abbreviation for Internet Protocol address. See
TCP/IP.
IPMI
Abbreviation for Intelligent Platform Management
Interface, which is an industry standard for
management of peripherals used in enterprise
computers based on Intel
®
architecture. The key
characteristic of IPMI is that inventory, monitoring,
logging, and recovery control functions are available
independent of the main processors, BIOS, and
operating system.
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