Operating instructions

restore point A system snapshot created by the System Restore utility that is
used to restore a malfunctioning system. See also system restore.
RG-58 Coaxial cabling used for 10Base2 networks.
RIMM (not an abbreviation) An individual stick of Rambus RAM.
RIS (Remote Installation Services) A tool introduced with Windows 2000
that can be used to initiate either a scripted installation or an installation of an
image of an operating system onto a PC.
riser card A special adapter card, usually inserted into a special slot on a
motherboard, that changes the orientation of expansion cards relative to the
motherboard. Riser cards are used extensively in slimline computers to keep to
-
tal depth and height of the system to a minimum.
RJ (registered jack) UTP cable connectors, used for both telephone and net-
work connections. RJ-11 is a connector for four-wire UTP; usually found in
telephone connections. RJ-45 is a connector for eight-wire UTP; usually found
in network connections.
RJ-11 See RJ (registered jack).
RJ-45 See RJ (registered jack).
ROM (read-only memory) The generic term for non-volatile memory that
can be read from but not written to. This means that code and data stored in
ROM cannot be corrupted by accidental erasure. Additionally, ROM retains its
data when power is removed, which makes it the perfect medium for storing
BIOS data or information such as scientific constants.
root directory The directory that contains all other directories.
router A device connecting separate networks that forwards a packet from
one network to another based on the network address for the protocol being
used. For example, an IP router looks only at the IP network number. Routers
operate at Layer 3 (Network) of the OSI seven-layer model.
RS-232C A standard port recommended by the Electronics Industry Associa
-
tion for serial devices.
58 MIKE MEYERS’ A+ CERTIFICATION PASSPORT
Passport / Mike Meyers‘ A+ Certification Passport / Meyers / 226308-3 / Glossary
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