Quick Reference Guide

336 Glossary
host adapter
A host adapter implements communication between the system's bus and the
controller for a peripheral device. (hard drive controller subsystems include
integrated host adapter circuitry.) To add a SCSI expansion bus to your system,
you must install or connect the appropriate host adapter.
hot plug
The ability to remove and replace a redundant part while the system is still
running. Also called a
hot spare.
HPFS
Abbreviation for the High Performance File System option in the Windows NT
operating systems.
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.
Hz
Abbreviation for hertz.
ICES
Abbreviation for Interface-Causing Equipment Standard (in Canada).
ICMB
Abbreviation for Intelligent Chassis Management Bus.
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.