Glossary v

An organization of vendors who have similar goals and who cooperate to make their products work together, typically while waiting on standards organizations to finish finalizing a standard. The Frame Relay Forum is one such consortium.

A broadcast domain created by configuring a switch and telling it which ports should be considered to be in the same broadcast domain.

A file, typically a program, that is placed onto a computer system using methods that circumvent security devices, with the intent to cause problems.

An Ethernet segment between two switches, over which the switches add a VLAN header to frames before sending the frames. The VLAN trunking header identifies in which VLAN the frame resides.

The process of adding and removing VLAN trunking headers when using a VLAN trunk.

The header added to an Ethernet frame before it is sent over a VLAN trunk.

The physical path that the telco creates to carry the analog voice signal to support a voice phone call.

The unit of measurement of voltage.

A term referring to electrical potential or electromotive force. In general terms, it is the energy and power that flow in electricity.

VPNs allow users of a public network, such as the Internet, to protect their data through encryption, making their network connection virtually private.

Software installed on an end user's PC that performs the encryption and decryption required to create a VPN.

A device and software installed at a corporate site, inside the corporate network, that performs the encryption and decryption required to create a VPN.