What is PPP agreement

PPP (Point-to-Point Protocol) is a data link layer protocol used to transmit datagrams between two directly connected (point-to-point) computers. The following article will give you a brief understanding of the PPP agreement. I hope it will be helpful to you.

The PPP protocol, also known as RFC 1661, is used to provide a very basic level of connection for data links between computers and is widely used for the heavier and more complex applications required for broadband communications. Faster connection.

There are many physical media used for point-to-point connections, such as simple serial cables, mobile phones, and telephone lines.

When two computers are directly connected, both ends will send configuration requests. After connecting computers, PPP handles link control, data control, and protocol encapsulation.

Composition of PPP protocol

PPP consists of three main components:

Encapsulation of multi-protocol data Reporting mechanism

PPP allows multiple network layer protocols to run on the same communication link. For each network layer protocol used, a separate Network Control Protocol (NCP) is provided to encapsulate and negotiate options for multiple network layer protocols. And additional features such as checksums can be provided to detect transmission errors.

Link Control Protocol (LCP)

LCP is responsible for establishing, maintaining, and tearing down connections between two endpoints; LCP also tests the link and determines whether it is active state.

LCP also provides authentication, error detection, error correction, compression and encryption functions

Network Control Protocol (NCP)

Initialize PPP The protocol stack handles multiple network layer protocols and is used to establish and configure different types of network layer protocols. Examples include IPv4, IPv6 and Connectionless Network Protocol (CLNP).

Description:

The PPP protocol is sometimes considered a member of the TCP/IP protocol suite. There are variations of PPP running Ethernet using the PPPoE specification and Asynchronous Transfer Mode (ATM) using the PPPoA specification.

The above is the entire content of this article, I hope it will be helpful to everyone's study. For more exciting content, you can pay attention to the relevant tutorial columns of the PHP Chinese website! ! !

The above is the detailed content of What is PPP agreement. For more information, please follow other related articles on the PHP Chinese website!