V

virtual LAN (VLAN)

Local area network (LAN) that allows users on different switch ports to participate in their own network separate from, but still connected to, the other stations on the same or a connected switch.

virtual link

A link created by using a switch to limit network traffic.

virtual private network (VPN)

System that uses the public Internet as a backbone for a private interconnection (network) between locations.

virus

A program intended to damage a computer system. Sophisticated viruses are encrypted and hide in a computer, and might not appear until the user performs a certain action or until a certain date. See also antivirus.

volume

The loudness of a sound, or the portion of a hard disk that functions as if it were a separate hard disk.

VPN

See virtual private network (VPN).