PPP


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PPP

(communications)

PPP

PPP

(Point-to-Point Protocol) The most popular method for transporting IP packets over a serial link between the user and the ISP. Developed in 1994 by the IETF and superseding the SLIP protocol, PPP establishes the session between the user's computer and the ISP using its own Link Control Protocol (LCP). PPP supports PAP and CHAP authentication, as well as EAP, which is a conduit for numerous other authentication methods (see PAP, CHAP and EAP).

Full-Duplex and Multilink
PPP can run on any full-duplex link from POTS to ISDN to T1, etc. On dial-up connections, PPP can hang up a low-quality call and redial. Using Multilink PPP (MLPPP), two modems and phone lines can be bonded together to increase speed.

PPP Encapsulates the Packets
PPP encapsulates high-level protocol packets in HDLC-based frames; for example, IP over PPP (IPCP) for the Internet and IPX over PPP (IPXCP) for NetWare networks, and it can multiplex different protocols over the same circuit. PPP also supports ATM and Ethernet frames for DSL and cable modem hookups (see PPPoA and PPPoE). See PPTP and SLIP.


PPP and L2TP Together
PPP and its counterpart, the Layer 2 Tunneling Protocol (L2TP), are used together to extend a PPP session across the Internet for remote users.







The PPP Stack
PPP resides at the data link layer in the stack. Its typical use is accessing the Internet via TCP/IP over an analog modem (RS-232), ISDN or a T1 line. However, PPP can also simultaneously multiplex other transport protocols such as IPX, Appletalk and DECnet.
References in periodicals archive ?
The WCX offers an example that could be tailored to regional PPP units throughout the United States.
The most mature PPP markets are the United Kingdom (Aa1 stable), Australia (Aaa stable) and Canada (Aaa stable), which boast established secondary and refinancing markets, plus a history of robust long-term pipelines.
--Streamline processes required to make PPP proposals by the private sector: easing document requirements and the minimum capital ratio requirement.
State authorities examine introducing amendments into regulatory legal acts as one of actuating tools of PPP in the country.
A local PPP leader alleged that two groups of the People's Students Federation had clashed with each other.
The PPP chairman said that there was nothing new in the fresh allegations against the PPP as all this was also happening before in the life-time of Zulfikar Ali Bhutto and Benazir Bhutto.
It is pertinent to mention here that Senior leader of Pakistan People's Party (PPP) Yousuf Raza Gilani on December 14, had extended his party's support to Pakistan Tehreek-e-Insaf (PTI) for creation of South Punjab province.
Despite all odds, he said, PPP still hoped that the Maulana would agree to withdraw in favour of Aitzaz.
According to PPP sources, the acting chief of the PPP in the NA, Shazia Marri was responsible to submit the application.
The PPP candidate was arrested a couple of days ago.
This development will enhance PPPs at the local level, as the PPP Center will help strengthen the capacities of local government units (LGUs) and other local implementing agencies (IAs) such as water districts, state universities and colleges (SUCs), among others, to include climate change mitigation and adaptation components in their portfolio of PPP projects.