Cisco 6400 Einstellungsanleitung PDF herunterladen (Seite 189)

Glossary

GL-15

Cisco 6400 Software Setup Guide

OL-1183-04

virtual circuit Logical circuit created to ensure reliable communication between two network devices. A virtual

circuit is defined by a VPI/VCI pair, and can be either permanent (PVC) or switched (SVC). Virtual

circuits are used in Frame Relay and X.25. In ATM, a virtual circuit is called a virtual channel.

Sometimes abbreviated VC.

virtual path

Logical grouping of virtual circuits that connect two sites. See also virtual circuit.

virtual template

interface

A logical interface configured with generic configuration information for a specific purpose or

configuration common to specific users, plus router-dependent information. The template takes the

form of a list of Cisco IOS interface commands that are applied to virtual access interfaces, as needed.

VP virtual path. One of two types of ATM circuits identified by a VPI. A virtual path is a bundle of virtual

channels, all of which are switched transparently across an ATM network based on a common VPI. See

also VPI.

VPI

virtual path identifier. An 8-bit field in the header of an ATM cell.

VPDN Virtual Private Dial-Up Networking. A system that permits dial-in networks to exist remotely to home

networks, while giving the appearance of being directly connected. VPDNs use L2TP and L2F to

terminate the Layer 2 and higher parts of the network connection at the home gateway, instead of the

NAS.

VPN virtual private network. A secure IP-based network that shares resources with one or more physical

networks. A VPN can contain one or more geographically dispersed sites that can communicate

securely over a shared backbone.

WAN

wide-area network. Data communications network that serves users across a broad geographic area and

often uses transmission devices provided by common carriers.

Web Console A graphical user interface (GUI) application that communicates with the system by translating HTML

pages into Cisco IOS commands.

xDSL Various types of digital subscriber lines. Examples include ADSL, HDSL, and VDSL.

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Cisco 6400 Einstellungsanleitung Seite 189