Summary
In this brief introduction to VPNs, you learned that network designers can choose from a wide range of technologies to create VPNs which can be classified into Layer 2 or Layer 3 VPNs, and further into site-to-site and remote access VPNs. Technologies such as Frame Relay, ATM, GRE, and MPLS are used with site-to-site VPNs. The most common remote access VPN technology is L2TP, and IPSec can be used for both remote access and site-to-site VPNs. |