What Is A Virtual Private Network?  
   A Network Computing Online Article
   http://www.networkcomputing.com/905/905colmoskowitz.html

L2F  
   CISCO's Layer Two Forwarding protocol
   http://cio.cisco.com/warp/public/732/L2F/

The Data VPN Movement  
   This article discusses several aspects related to the deployment of VPNs in the corporate world
   http://www.teledotcom.com/0597pl/tdc0597plvpn.corp.html

Virtual Private Networks (VPN)  
   This document discusses key concepts related to Virtual Private Networks
   http://www.rad.net.id/homes/edward/intranet/intra7

Virtual Private Networking: A Microsoft Overview  
   An overview of virutal private networks and some of the key technologies that permit private networking over public internetworks.
   http://msdn.microsoft.com/workshop/server/feature/vpnovw.asp

ITpapers.com - Remote Access VPN  
   A collection of VPN whitepapers for remote access, including Windows 2000, SmartGate, WebRamp, and others.
   http://www.itpapers.com/cgi/SearchIT.pl?scid=36&search=VPN

ITpapers.com - VPN Whitepapers  
   A collection of VPN whitepapers covering much ground from general issues to specific ones like 802.11b
   http://www.itpapers.com/cgi/SearchIT.pl?scid=192&search=VPN

OpenReach VPN White Papers  
   We are a VPN services company that offers point-and-click VPN services. Here is a list of our VPN white papers.
   http://www.openreach.com/customers/whitepapers.html