> It depends on the definition of VPN. in my definition, the P stands for privacy not plaintext
> In terms of services like MPLS-based VPNs, it refers to the extension > of a Private network over a shared infrastructure, allowing entities > using the shared infrastructure to have their own private address > space and routing tables. i think we wrote the paper on that :) http://www.ieee-infocom.org/2003/papers/36_02.PDF randy
