Cisco Systems 78-11450-03 specifications GL-3

Glossary

B

Backplane

Bellcore

BER

BGP

Bit error rate

Border Gateway Protocol

Broadcast

The circuit board at the back of the chassis that all components plug into. It provides the physical connection between an interface processor or line card, and the data and power distribution buses inside a chassis.

Bell Communications Research. Former name of the organization that performs research and development on behalf of the Regional Bell Operating Companies (RBOCs). Bellcore is now called Telcordia.

Bit error rate. The ratio of received bits that contain errors.

Border Gateway Protocol. An interdomain routing protocol that replaces EGP. BGP exchanges connection information with other BGP systems. It is defined by RFC 1163.

See BER.

See BGP.

Data packet that is sent to all nodes on a network. Broadcasts are identified by a broadcast address. Compare with Multicast and Unicast.

C

CCITT

CEF

Consultative Committee for International Telegraph and Telephone. International organization responsible for the development of communications standards. Now called the ITU-T. (See ITU-T.)

Cisco Express Forwarding. An advanced Layer 3 IP switching technology designed for high-performance, highly resilient Layer 3 IP backbone switching. CEF optimizes network performance and scalability for networks with large and dynamic traffic patterns, such as the Internet, on networks characterized by intensive Web-based applications or interactive sessions.

Central Office	See CO.
Channel	Communication path. Multiple channels can be multiplexed over a single cable in certain
	environments.
Cisco Express	See CEF.
Forwarding
Cisco IOS	Cisco system software that provides common functionality, scalability, and security for Cisco products.
	Cisco IOS allows centralized, integrated, and automated installation and management of internetworks,
	while ensuring support for a wide variety of protocols, media, services, and platforms.

Clear channel DS3

CLI

A framed DS3 signal which is not multiplexed from 28 DS1 signals. Sometimes referred to as unchannelized DS3.

Command line interface. Interface that allows the user to interact with the operating system by entering commands and optional arguments at the command prompt.

	Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
78-11450-03 Rev.B0		GL-3