Glossary

Virtual private network

A private data network that makes use of a public network, such as the Internet, by encrypting data at one node and using security procedures that provides a "tunnel" through which the data can pass to another node.

Virus

Code written with the express intention of replicating itself. A virus attempts to spread from computer to computer by infecting another file, typically an executable program. Besides spreading, viruses can be used to do harm or for criminal activity.  See also: trojan, worm and spyware.

Voice over IP

A technology for transmitting phone-like voice conversations over the internet

Vulnerability

Any product flaw, administrative process or act, or physical exposure that makes a computer susceptible to attack by a malicious user.