The Point-to-Point Protocol (PPP) is a standardized point-to-point network encapsulation method that provides Data Link Layer functionality comparable to LAN encapsulations. PPP provides frame delimitation, protocol identification, and bit-level integrity services. PPP is defined in RFC 1661.
All of the RFCs referenced in this chapter can be found in the \Standards\Chap02_WAN folder on the companion CD-ROM.
RFC 1661 describes PPP as a suite of protocols that provide the following:
A Data Link Layer encapsulation method that supports multiple protocols simultaneously on the same link.
A protocol for negotiating the Data ...