O'Reilly logo

Cisco CCNA Routing and Switching ICND2 200-101 Official Cert Guide by Wendell Odom

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

VPN Fundamentals

ImageLesson 10: VPN

Leased lines have some wonderful security features. The router on one end knows with confidence the identity of the device on the other end of the link. The receiving router also has good reason to believe that no attackers saw the data in transit, or even changed the data to cause some harm.

VPNs try to provide the same secure features as a leased line while sending data over a network that is open to other parties. In fact, the data often crosses the Internet. Even when sending data over public networks like the Internet, VPNs can provide the following:

Confidentiality (Privacy): Preventing anyone in the middle ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required