Point-to-Point Protocol (PPP) is a TCP/IP protocol used to connect one computer system to another. Computers use PPP, or Point-to-Point Protocol, to communicate over the telephone network or the Internet.
A PPP connection exists when two systems physically connect through a telephone line. You can use PPP to connect one system to another. For example, an established PPP connection between a branch office and a central office allows either office to transfer data to the other through the network.
PPP is an Internet standard. It is the most widely used connection protocol among Internet Service Providers (ISPs). You can use PPP to connect to your ISP; your ISP then gives you connectivity to the Internet.
PPP allows interoperability among the remote access software of different manufacturers. It also allows multiple network communication protocols to use the same physical communication line.
The following Request For Comment (RFC) standards describe the PPP protocol. You can find more information about the RFCs on the RFC Editor Web page.