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URL: http://www.ietf.org/rfc/rfc2764.txt
This
document describes a framework for Virtual Private Networks (VPNs) running
across IP backbones. It discusses the various different types of VPNs, their
respective requirements, and proposes specific mechanisms that could be used to
implement each type of VPN using existing or proposed specifications. The
objective of this document is to serve as a framework for related protocol
development in order to develop the full set of specifications required for
widespread deployment of interoperable VPN solutions.
Keywords:
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