Virtual Private Network is a network within a network. This is very popular with businesses that have people working remotely. In essence what we have here is the use of the network already provided by the Internet. Internet infrastructure can be used as a network for remote employees to access their corporate systems.

Corporate environments have a far greater need for tight security. This is achieved by creating a VPN (virtual private network) on top of the normal internet connection. This type of connection allows for greater security and encryption.