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Online Computer Terms Dictionary - P

Point-to-Point Protocol

<communications, protocol> (PPP) The protocol defined in RFC 1661, the Internet standard for transmitting network layer datagrams (e.g. IP packets) over serial point-to-point links.

PPP has a number of advantages over SLIP; it is designed to operate both over asynchronous connections and bit-oriented synchronous systems, it can configure connections to a remote network dynamically, and test that the link is usable. PPP can be configured to encapsulate different network layer protocols (such as IP, IPX, or AppleTalk) by using the appropriate Network Control Protocol (NCP).

RFC 1220 describes how PPP can be used with remote bridging.

Usenet newsgroup: comp.protocols.ppp.

A paper on PPP.

(1994-12-13)

 


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Point-to-Point Protocol over Ethernet

<communications, protocol> (PPPoE) The protocol defined in RFC 2516 that allows one or more computers to connect to the Internet via a shared modem. The computers connect to the modem via a local area network such as Ethernet and the modem connects to an Internet Service Provider (ISP) via a serial connection such as PPP over ADSL.

PPPoE provides each user with a connection that looks and behaves like a point-to-point dial-up connection even though they are actually sharing an Ethernet or wireless network. At the same time, the ISP only needs to provide a single Internet connection, with the same kind of accounting as for PPP. Also, the IP address is only assigned when the PPPoE connection is open, allowing the dynamic reuse of IP addresses via DHCP.

PPPoE works by encapsulating PPP frames in Ethernet frames.

(2006-09-20)

 


Nearby terms: point of presence point of sale terminal Point-to-Point Protocol Point-to-Point Protocol over Ethernet Point-to-Point Tunneling Protocol Poisson distribution poke

Point-to-Point Tunneling Protocol

<communications, protocol> (PPTP) A tunneling protocol for connecting Windows NT clients and servers over Remote Access Services (RAS). PPTP can be used to create a Virtual Private Network between computers running NT. It is an extension of PPP sponsored by Microsoft.

Microsoft Point to Point Encryption may be used with PPTP to provide an encrypted connection but PPTP itself does not use encryption.

Compare: Layer Two Tunneling Protocol.

[Origin? Standard? Document?]

(1998-09-23)

 


Nearby terms: point of sale terminal Point-to-Point Protocol Point-to-Point Protocol over Ethernet Point-to-Point Tunneling Protocol Poisson distribution poke Polka
 

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