a VPN (virtual private network). A VPN is a private network that uses a public network (usually the Internet) to connect remote sites or users together.

The VPN uses "virtual" connections routed through the Internet from the business's private network to the remote site or employee. By using a VPN, businesses ensure security -- anyone intercepting the encrypted data can't read it.

A VPN connection to a business's main office can help its employees be more productive when they're on the go.