An SSL VPN (Secure Sockets Layer virtual private network) is a form of VPN that can be used with a standard Web browser.
In contrast to the traditional Internet Protocol Security (IPsec) VPN, an SSL VPN does not require the installation of specialized client software on the end user's computer.
A VPN provides a secure communications mechanism for data and other information transmitted between two endpoints.
An SSL VPN consists of one or more VPN devices to which the user connects by using his Web browser.