Operating instructions

CPU fan The cooling unit that sits directly on and cools the CPU.
CPUID Information stored in a CPU that gives very detailed information
about every aspect of the CPU including vendor, speed, and model. Many pro
-
grams access and display this information.
CRC (cyclic redundancy check) A very accurate mathematical method that
is used to check for errors in long streams of transmitted data. Before data is
sent, the main computer uses the data to calculate a CRC value from the datas
contents. If the receiver calculates a different CRC value from the received data,
the data was corrupted during transmission and is resent. Ethernet packets have
a CRC code.
C-RIMM (continuity RIMM) A passive device added to populate unused
banks in a system that uses RAMBUS RIMMs.
crossover cable Special UTP cable used to connect hubs or to connect net-
work cards without a hub. Crossover cables reverse the sending and receiving
wire pairs from one end to the other.
crossover port Special port in a hub that crosses the sending and receiving
wires, thus removing the need for a crossover cable to connect the hubs.
CRT (cathode ray tube) The tube of a monitor in which rays of electrons are
beamed onto a phosphorescent screen to produce images. Also a shorthand way
to describe a monitor that uses CRT rather than LCD technology.
CSMA/CD (carrier sense multiple access with collision detection) The ac
-
cess method Ethernet systems use in local area networking technologies en
-
abling packets of data information to flow through the network ultimately to
reach address locations.
cylinder A single track on all the platters in a hard drive. Imagine a hard drive
as a series of metal cans, nested one inside another; a single can would represent
a cylinder.
Cyrix Company that made CPUs in direct competition with Intel and AMD.
Bought by Via Technologies in 2000.
daily backup Also called daily copy backup. A backup of all files that have
been changed on that day without changing the archive bits of those files.
Passport / Mike Meyers‘ A+ Certification Passport / Meyers / 226308-3 / Glossary
18 MIKE MEYERS A+ CERTIFICATION PASSPORT
P:\010Comp\Passport\308-3\gloss.vp
Monday, April 09, 2007 10:24:42 PM
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