PPP originally emerged as an encapsulation protocol for transporting IPv4 traffic over point-to-point links. PPP provides a standard method for transporting multiprotocol packets over point-to-point links.
There are many advantages to using PPP including the fact that it is not proprietary. PPP includes many features not available in HDLC:
- The link quality management feature, as shown in the figure, monitors the quality of the link. If too many errors are detected, PPP takes the link down.
- PPP supports PAP and CHAP authentication. This feature is explained and practiced in a later section.