Users Guide

Glossary 201
RBAC
Abbreviation for role-based access control.
read-only file
A read-only file is one that you are prohibited from editing or deleting. A file can
have read-only status if:
• Its read-only attribute is enabled.
• It resides on a physically write-protected diskette or on a diskette in a
write-protected drive.
• It is located on a network in a directory to which the system administrator has
assigned read-only rights to you.
readme file
A text file included with a software package or hardware product that contains
information supplementing or updating the documentation for the software or
hardware. Typically, readme files provide installation information, describe new
product enhancements or corrections that have not yet been documented, and list
known problems or other things you need to be aware of as you use the software
or hardware.
real mode
An operating mode supported by 80286 or higher microprocessors, real mode
imitates the architecture of an 8086 microprocessor.
refresh rate
The rate at which the monitor redraws the video image on the monitor screen.
More precisely, the refresh rate is the frequency, measured in Hz, at which the
screen's horizontal lines are recharged (sometimes also referred to as its vertical
frequency). The higher the refresh rate, the less video flicker can be seen by the
human eye. The higher refresh rates are also noninterlaced.
remote management system
A remote management system is any system that accesses the Server
Administrator home page on a managed system from a remote location using a
supported Web browser. See managed system.
ROM
Acronym for read-only memory. Your system contains some programs essential
to its operation in ROM code. Unlike RAM, a ROM chip retains its contents even
after you turn off your system. Examples of code in ROM include the program
that initiates your system's boot routine and the POST.