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Appendix D: Glossary
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
Bandwidth - The transmission capacity of a given device or network.
Bandwidth Assignments - Indicates the amount of bandwidth assigned to a specific application, user, and/or
interface.
Baud - Indicates the number of signaling elements transmitted each second.
Best Effort - Indicates that traffic is assigned to the lowest priority queue, and packet delivery is not guaranteed.
Bit - A binary digit.
Boot - To start a device and cause it to start executing instructions.
Browser - An application program that provides a way to look at and interact with all the information on the
World Wide Web.
Bridge - A device that connect two networks. Bridges are hardware specific, however they are protocol
independent. Bridges operate at Layer 1 and Layer 2 levels.
Broadcast Domain - Devices sets that receive broadcast frames originating from any device within a designated
set. Routers bind Broadcast domains, because routers do not forward broadcast frames.
Broadcast Storm - An excessive amount of broadcast messages simultaneously transmitted across a network
by a single port. Forwarded message responses are heaped onto the network, overloading network resources or
causing the network to time out.
Burst - A packet transmission at faster than normal rates. Bursts are limited in time and only occur under
specific conditions.
Burst Size - Indicates the burst size transmitted at a faster than normal rate.
Byte - A unit of data that is usually eight bits long
Cable Modem - A device that connects a computer to the cable television network, which in turn connects to the
Internet.
CBS (Committed Burst Size) - Indicates the maximum number of data bits transmitted within a specific time
interval.
CIR (Committed Information Rate) - The data rate is averaged over a minimum time increment.
Class Maps - An aspect of Quality of Service system that is comprised of an IP ACL and/or a MAC ACL. Class
maps are configured to match packet criteria, and are matched to packets in a first-fit fashion.
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