Glossary
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autoreconfiguration
A procedure executed by nodes within the failure
domain of a Token Ring, wherein nodes automatically perform diagnostics,
trying to reconfigure the network around failed areas.
Auto-RP
An IOS feature that allows multicast-enabled routers to detect RP
and forward the summary information to other routers and hosts.
auxiliary port
The console port on the back of Cisco routers that allows
you to dial the router and make console configuration settings.
AVVID
Architecture for Voice, Video and Integrated Data: This is a Cisco
marketing term to group their convergence efforts. Convergence is the inte-
gration of historically distinct services into a single service.
B8ZS
Binary 8-Zero Substitution: A line-code type, interpreted at the
remote end of the connection, that uses a special code substitution whenever
eight consecutive zeros are transmitted over the link on T1 and E1 circuits.
This technique assures ones density independent of the data stream. Also
known as bipolar 8-zero substitution. Contrast with: AMI. See also: ones
density.
backbone
The basic portion of the network that provides the primary
path for traffic sent to and initiated from other networks.
back end
A node or software program supplying services to a front end.
See also: server.
backup designated router (BDR)
Used in OSPF routing to make sure
area information is still advertised if the designated router goes down.
bandwidth
The gap between the highest and lowest frequencies employed
by network signals. More commonly, it refers to the rated throughput
capacity of a network protocol or medium.
BoD
Bandwidth on Demand: This function allows an additional B channel
to be used to increase the amount of bandwidth available for a particular
connection.
baseband
A feature of a network technology that uses only one carrier fre-
quency. For example, Ethernet. Also named "narrowband." Compare with:
broadband.
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