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Glossary
g-5
Glossary
also Event Log; Hardware Log; Link Incident Log; Threshold Alert
Log.
(2) See EFC Audit Log.
availability The accessibility of a computer system or network resource.
B
b See bit.
B See byte.
backbone Cable on which two or more stations or networks may be attached,
typically used to link computer networks at one site with those at
another. Smaller branch networks are sometimes called ribs.
backplane The backplane provides direct current (DC) power distribution and
connections for all logic cards.
backup
field-replaceable unit
Backup FRU. When an active FRU fails, an identical backup FRU
takes over operation automatically (failover) to maintain director or
switch and Fibre Channel link operation. See also active field-replace-
able unit.
backup FRU See backup field-replaceable unit.
bandwidth (1) The amount of data that can be sent over a given circuit. (2) A
measure of how fast a network can move information, usually mea-
sured in Hertz (Hz).
baud The unit of signaling speed, expressed as the maximum number of
times per second the signal can change the state of the transmission
line or other medium. The units of baud are seconds to the negative 1
power. Note: With Fibre Channel scheme, a signal event represents a
single transmission bit.
BB_Credit See buffer-to-buffer credit.
beaconing Use of light-emitting diodes (LEDs) on ports, port cards,
field-replaceable units (FRUs), and directors to aid in the fault-isola-
tion process. When enabled, active beaconing will cause LEDs to flash