The two authentication protocols of PPP are РІв‚¬вЂ™Р”В¬hallenge Handshake Authentication Protocol (CHAP) It also imparts negotiation for set up of options and use of features by the two endpoints of the links.Р”Р„uthentication Protocols (AP) РІв‚¬вЂ™ These protocols authenticate endpoints for use of services. Link Control Protocol (LCP) РІв‚¬вЂ™ It is responsible for establishing, configuring, testing, maintaining and terminating links for transmission. Point - to - Point Protocol is a layered protocol having three components РІв‚¬вЂ™Р”В®ncapsulation Component РІв‚¬вЂ™ It encapsulates the datagram so that it can be transmitted over the specified physical layer. Supporting a variety of network layer protocols by providing a range os services. Providing connections over multiple links.

Providing address for network communication. Stating authentication rules of the communicating devices. Stating the method of encapsulation of network layer data in the frame. The main services provided by Point - to - Point Protocol are РІв‚¬вЂ™Р”Вefining the frame format of the data to be transmitted.Р”Вefining the procedure of establishing link between two points and exchange of data. Since it is a data link layer protocol, data is transmitted in frames.

It is a byte - oriented protocol that is widely used in broadband communications having heavy loads and high speeds.

Point - to - Point Protocol (PPP) is a communication protocol of the data link layer that is used to transmit multiprotocol data between two directly connected (point-to-point) computers.

Address field in ppp frame