Users Guide

164 Glossary
authentication
The Server Administrator remote access controller has two methods of
authenticating user access:
RAC authentication and local operating system authentication. RAC authentication
is always enabled. Administrators can set up specific user accounts and passwords
that allow access to the RAC.
Operating systems also require administrators to define different levels of users
and user accounts; each user level has different privileges. Local operating system
authentication on the RAC is an option for administrators who do not want to
define one set of privileges for users in the operating system and a separate set of
users and accounts for the RAC. If you enable local operating system
authentication for the RAC, you enable any user with Administrator status on
the operating system to log in to the RAC.
baud rate
A measurement of data transmission speed. For example, modems are designed
to transmit data at one or more specified baud rate(s) through the COM (serial)
port of a system.
beep code
A diagnostic message in the form of a pattern of beeps from your system's speaker.
For example, one beep, followed by a second beep, and then a burst of three beeps
is beep code 1-1-3.
BGA
Abbreviation for ball grid array, an integrated circuit (IC) package that uses an
array of solder balls, instead of pins, to connect to a system board.
BMC
Abbreviation for baseboard management controller, which is a controller that
provides the intelligence in the IPMI structure.
boot routine
When you start your system, it clears all memory, initializes devices, and loads
the operating system. Unless the operating system fails to respond, you can reboot
(also called warm boot) your system by pressing <Ctrl><Alt><Del>;
otherwise, you must perform a cold boot by pressing the reset button or by turning
the system off and then back on.
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