3Com 3C971-F manual Token ring, Virtual circuit virtual channel, Virtual path

GLOSSARY 7

STM-1

Synchronous Transfer Mode, level 1. A European standard defining a signal with a data rate of 155.52 Mbps.

SVC

Switched Virtual Circuit. Creates a dynamic connection between two network nodes. SVCs are created “on demand” and are torn down upon completion of the data transfer.

TCP/IP

Transmission Control Protocol/Internet Protocol. Network architecture standard for internetworking multiple organizations. The TCP/IP protocol stack is dominant in academic and research sites, and is the standard protocol for the Internet.

Token ring

A 4 megabit per second or a 16 megabit per second network using a ring topology and a token-passing access method.

VBR

Variable Bit Rate. The transmission of data bits at varying rates over a network.

VCI

Virtual Circuit Identifier. A two-byte field in an ATM cell header that, when combined with the VPI (Virtual Path Identifier), makes up an ATM address.

Virtual circuit (virtual channel)

A “logical transmission path” or connection between two network endpoints.

Virtual path

A group of virtual circuits that connect two network devices.