Virtual Private Networks
I’d be pretty willing to bet you’ve heard the term VPN more than once before. Maybe you even know what one is, but just in case, a virtual private network (VPN) allows the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols. VPNs are used daily to give remote users and disjointed networks connectivity over a public medium like the Internet instead of using more expensive permanent means.
Types of VPNs are named based upon the role they play in a business. There are three different categories of VPNs:
Remote access VPNs Remote access VPNs allow remote users such as telecommuters to securely access the corporate network wherever and whenever they need to.