Cisco 10000-2P2-2DC Software Guide - Page 585
Glossary, Broadband Aggregation.
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GLOSSARY A AAA AAL5 ABR ACL ADSL ATM authentication authentication, authorization, and accounting (pronounced "triple a"). ATM adaptation layer. This layer maps higher layer user data into ATM cells, making the data suitable for transport through the ATM network. Available bit rate. QoS class defined by the ATM Forum for ATM networks. ABR is used for connections that do not require timing relationships between source and destination. ABR provides no guarantees in terms of cell loss or delay, providing only best-effort service. Traffic sources adjust their transmission rate in response to information they receive describing the status of the network and its capability to successfully deliver data. Access Control List. A list kept by routers to control access to or from the router for a number of services (for example, to prevent packets with a certain IP address from leaving a particular interface on the router). Asymmetric digital subscriber line. A digital subscriber line (DSL) technology in which the transmission of data from server to client is much faster than the transmission from the client to the server. Asynchronous Transfer Mode. International standard for cell relay in which multiple service types (such as voice, video, or data) are conveyed in fixed-length cells. Fixed-length cells allow cell processing to occur in hardware, thereby reducing transit delays. ATM is designed to take advantage of high-speed transmission media such as E3, SONET, and T3. A security feature that allows access to information to be granted on an individual basis. B bandwidth BBA BGP bps bridge OL-2226-23 The range of frequencies a transmission line or channel can carry. The greater the bandwidth, the greater the information-carrying capacity of a channel. For a digital channel this is defined in bits. For an analog channel it is dependent on the type and method of modulation used to encode the data. Broadband Aggregation. Border Gateway Protocol. Interdomain routing protocol that exchanges reachability information with other BGP systems. It is defined in RFC 1163. Bits per second. A standard measurement of digital transmission speeds. A device that connects two or more physical networks and forwards packets between them. Bridges can usually be made to filter packets, that is, to forward only certain traffic. Cisco 10000 Series Router Software Configuration Guide GL-1
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