Sun Microsystems Sun Fire X4150 - Manual (Page 145)

Glossary 129
user identification
(userID) A unique string identifying a user to a system.
user identification
number (UID
number) The number assigned to each user accessing a UNIX system. The system uses
UID numbers to identify, by number, the owners of files and directories.
user name A combination of letters, and possibly numbers, that identifies a user to the
system.
V
voltage regulator
module (VRM) An electronic device that regulates a system’s microprocessor voltage
requirements to maintain the correct voltage.
volume One or more disk drives that can be grouped into a unit for data storage.
volume manager Software that organizes data blocks on physical disk drives into logical
volumes, which makes the disk data independent of the physical path name of
the disk drives. Volume manager software provides data reliability through
disk striping, concatenation, mirroring, and dynamic growth of metadevices or
volumes.
W
W3C Refers to the World Wide Web Consortium. W3C is an international
organization that governs Internet standards.
web server Software that provides services to access the Internet or an intranet. A web
server hosts web sites, provides support for HTTP/HTTPS and other protocols,
and executes server-side programs.
wide area network
(WAN) A network consisting of many systems that provides file transfer services. A
WAN can cover a large physical area, sometimes worldwide.