3Com 520 - Manual (Page 82)

C-2 C H A P T E R C: G L O S S A R Y
B Channel A digital data communications channel
running at 64 Kbps. The basic rate ISDN 2 service
carries two B channels plus one control D channel.
Refer to ISDN and D Channel .
Backbone A network cabling segment that
interconnects a group of network segments or
systems.
Bandwidth The capacity of data communications
system or channel.
Baseband A communication technique in which
network cable is used to carry a single stream of data
at a time.
Baud A unit of signalling speed equal to the
number of signalling events in one second.
Bit Either of the digits 0 or 1 when used in the binary
numeration system. Eight bits equals a single byte.
Bridge A device that links two or more local or
remote area networks together. A bridge may be
used to extend the network or to connect two
different network transport technologies together.
Broadband A communications technique in which
network cabling is used to carry multiple streams of
data simultaneously.
Broadcast Storm A rare event in which broadcast
frames are propagated endlessly through the
network because poorly configured bridge and
router connections.
Bus A single segment through which devices are
connected. An Ethernet LAN is based on a bus
network which connects all communicating
workstations with a common cable.
Byte A string that consists of eight data bits treated
as a unit.
Call Guillotine A feature that disconnects a call
after a certain period of time irrespective of whether
data is being passed across the link or not.
CCITT Comité Consultatif International
Téléphonique et Télégraphique, now renamed ITU,
International Telecommunication Union.
Rc.bk : GLOSSARY.FRM Page 2 Thursday, July 10, 1997 9:53 AM