CCNA® Cisco Certified Network Associate: Study Guide, Seventh Edition

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.

Site-to-site ...