Chapter 12. Virtual Private Networks
On completing this chapter, you will be able to
Explain IPSec
Describe the difference between transport mode and tunnel mode
Explain transform sets
Understand the difference between ESP and AH
Describe antireplay protection
A virtual private network (VPN) is a service that offers a secure, reliable connection over a shared public infrastructure such as the Internet. Cisco defines a VPN as an encrypted connection between private networks over a public network. To date, there are three types of VPNs:
Remote access
Site-to-site
Firewall-based
The remote access VPN solution is shown in Figure 12-1. Telecommuters and mobile phone users use remote access VPNs to work on the corporate network while out of the office.
Figure 12-1. Remote ...
Get Network Security Fundamentals now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
