Virtual_Private_Networks

See also:

About.com VPN directory - A smattering of VPN resources including a glossary and a self-test.
Corecom VPN FAQ Page - Geared towards those new to VPN.
Find VPN - Directory of VPN providers, articles, and links.
How Stuff Works: How Virtual Private Networks Work - Gives definition of VPN and an overview of general VPN topics, includes diagrams and an animation.
NW Fusion: Research: VPNs - A collection of VPN resources and articles.
Tom Dunigan's Virtual Private Networks page - This page describes IP-based VPN technology over the Internet
Virtual Private Network Consortium - VPNC is the international trade association for manufacturers in the VPN market.
VPN labs - research community - VPN labs is an open community for researching, reviewing, and discussing Virtual Private Networks.