Point-to-point Protocol - Description

Description

PPP and TCP/IP protocol stack
Application FTP SMTP HTTP DNS
Transport TCP UDP
Internet IP IPv6
Network access PPP
PPPoE PPPoA
Ethernet ATM

PPP was designed somewhat after the original HDLC specifications. The designers of PPP included many additional features that had been seen only in proprietary data-link protocols up to that time.

RFC 2516 describes Point-to-Point Protocol over Ethernet (PPPoE) as a method for transmitting PPP over Ethernet that is sometimes used with DSL. RFC 2364 describes Point-to-Point Protocol over ATM (PPPoA) as a method for transmitting PPP over ATM Adaptation Layer 5 (AAL5), which is also a common alternative to PPPoE used with DSL.

PPP is specified in RFC 1661.

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