Microsoft pptp vpn vulnerabilities Exploits in Action

PPP (Point to Point Protocol)
RFC 1661 
http://www.cis.ohio-state.edu/cgi-bin/rfc/rfc1661.html
describes PPP in detail. A (very) brief summary follows:
“The Point-to-Point Protocol (PPP) provides a standard method for 
transporting multi-protocol datagrams over point-to-point links” (RFC 1661 
Abstract).
The 3 key parts of PPP are:
Encapsulation method for multi-protocol datagrams
•
Extensible LCP (Link Control Protocol) for creation, configuring and 
•
maintaining  the connection
NCP (Network Control Protocols) for creating and configuring different 
•
network layer protocols