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Glossary
Avaya P460 Reference Guide 197
inform the bridges of the topology of the network and detect loops and topology
changes.
Broadcasting
A common method of information transmission in which a packet is sent to every
port on the network.
Bridge
A device connecting two networks using similar protocols. A bridge filters and
forwards data between the networks according to their destination addresses.
Burst
A transmission of data at a faster rate than normal. Data bursts can be carried out in
several ways. A burst is always limited in time and can take place only under
special conditions.
Bus
A transmission path or channel. A bus is typically an electrical connection with one
or more conductors, where all attached devices receive all transmissions at the same
time.
BUS
Broadcast and Unknown Server. A multicast server used in ELANs that is used to
forward multicast and broadcast traffic to the appropriate clients.
CAM
Content Address Memory. A list kept by each port containing the addresses of all
network elements connected to the port. CAM is accessed according to its contents,
not its memory address.
CBR
Constant (or Continuous) Bit Rate. An ATM class of service that supports the
transmission of a continuous bit-stream of information. CBR is used for connections
that depend on precise timing to ensure undistorted delivery, such as voice and
video.
Cell
The basic ATM transmission unit, consisting of a 53-byte packet (5-byte header and
48-byte payload). User traffic is segmented into cells at the source and reassembled
at the destination.
Cell Header
The 5-byte ATM cell header contains control information regarding the destination
path and flow control.