Chapter 18. Virtual Private Networks (VPNs)
Understand the definition of VPN and the categorization of VPNs based on the underlying technologies, applications, and provided services.
Understand the basics of IPSec protocols and the IKE protocol.
Understand the basics of L2TP.
Understand the basics of MPLS-based VPN.
As more companies have started to rely on the Internet for their communications, the market of virtual private networks (VPNs) has grown significantly in recent years. VPN technologies continue to evolve as new standards, products, and services emerge. This has caused companies that want to deploy VPNs some confusion over what is a VPN, what types of services certain types of VPNs provide, and what is the right type of VPN for ...