Appendix B: Glossary
AUI (attachment unit interface)
A standard connector type used for Ethernet connections.
backbone
The major, central transmission path for a network. A backbone usually handles
bandwidth
A measure of the amount of traffic a given medium can handle at one time: The communications capacity (measured in bits per second), of a transmission line or of a specific path through a network. Greater bandwidth generally means more information can be sent through a circuit during any given period of time.
BPDU (bridge protocol data unit)
A data unit transmitted as part of the IEEE 802.1d Spanning Tree Protocol. The exchange of BPDUs allows bridges within a network to logically configure the network as a single spanning tree.
bps (bits per second)
The basic unit of data communications rate measurement.
bridge
An intelligent, protocol independent device used to connect similar or dissimilar LANs.
bursty
Adjective used to describe sporadic heavy volumes of network traffic (e.g., bursty traffic).
bypass
Optical or electronic isolation of a station from the network. A bypass situation typically occurs as a result of a station failure or shutdown; the bypass allows the network to function normally, except for the absence of the missing station.
combination port filter
A filter that can include several configurable fields and can be used to filter network traffic in a specific way.
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