Basics of PPP

PPP

Point to Point Protocol

PPP is a communication protocol of the data link layer, used to transmit multiprotocol data between two straight connected or point-to-point connected computers.

It is used for point-to-point link and is of standard RFC 1661 and is one of the WAN (wide area network) protocol. 

When PPP is castoff on a link, it will transform with the other side of the link. PPP negotiation involves of three phases: LCP, Authentication, and NCP.

It have three Main features;

• A method for encapsulating multi-protocol datagrams.
• A Link Control Protocol (LCP) for establishing, configuring, and testing the data-link connection.
• A family of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols.

PPP uses HDLC as a basis for encapsulating datagrams over point-to-point links.

PPP uses its specific security mechanisms that can be used to authenticate connection requests, allowing the implementation to protect the device from unauthorized use. The security mechanisms supported by PPP are password authentication and a challenge-handshake.

High-Level Data Link Control (HDLC) is a bit-oriented code-transparent synchronous data link layer protocol. It offers both connection-oriented and connectionless service.

-DR