A detailed guide for deploying PPTP, L2TPv2, L2TPv3, MPLS Layer-3, AToM, VPLS, and IPSec virtual private networks * Brings together all the major VPN technologies, detailing the technologies, their applications, and configurations * Provides review questions and configuration labs to help readers synthesize their understanding of these technologies * Easy comparison of VPN technologies. Readers can clearly discern advantages and disadvantage of the respective VPN types discussed in the bookThe cost savings associated with VPNs is tremendous. VPNs enable users in remote offices or locations to enjoy the same level of productivity as those who are in the same physical location of the central network. However, with so many flavors of VPNs available, companies and providers are often hard pressed to identify the VPN solutions that are most appropriate for their particular network design and service needs. Comparing, Designing, and Deploying VPNs will bring together many of the most popular VPN technologies for convenient reference. The book examines the operation, application, and configuration of Point-to-Point Tunneling Protocol (PPTP), Layer-2 Tunneling Protocol version 2 (L2TPv2), Layer-2 Tunneling Protocol version 3 (L2TPv3), MPLS Layer-3, Any Transport over MPLS (AToM), and Virtual Private LAN Service (VPLS) virtual private networks. For the first time, engineers and network architects will be able to use one book to learn the purpose, functionality, and configuration of the various flavors of major VPNs.