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Topic: Point to Point Protocol


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In the News (Thu 20 Jun 19)

  
 Point-to-Point Protocol - Wikipedia, the free encyclopedia
In computing, the Point-to-Point Protocol, or PPP, is commonly used to establish a direct connection between two nodes.
PPP is commonly used to act as a layer 2 (the "Data Link" layer of the OSI model) protocol for connection over synchronous and asynchronous circuits.
PPP was designed to work with several network layer protocols, such as IP, IPX and AppleTalk, and as a replacement for the non-standard layer 2 protocol SLIP.
en.wikipedia.org /wiki/Point-to-Point_Protocol   (642 words)

  
 Point-to-Point Protocol Extensions (pppext) Charter
The Point-to-Point Protocol (PPP, RFC 1661) is a mature protocol with a
PPP Stac LZS Compression Protocol (RFC 1974) (0 bytes)
PPP LZS-DCP Compression Protocol (LZS-DCP) (RFC 1967) (0 bytes)
www.ietf.org /html.charters/pppext-charter.html   (718 words)

  
 PPP - a Whatis.com definition - see also: Point-to-Point Protocol
PPP (Point-to-Point Protocol) is a protocol for communication between two computers using a serial interface, typically a personal computer connected by phone line to a server.
PPP is a full-duplex protocol that can be used on various physical media, including twisted pair or fiber optic lines or satellite transmission.
PPP is usually preferred over the earlier de facto standard Serial Line Internet Protocol (SLIP) because it can handle synchronous as well as asynchronous communication.
searchnetworking.techtarget.com /sDefinition/0,,sid7_gci214311,00.html   (293 words)

  
 PPP, Point-to-Point Protocol
A collection of protocols designed for moving datagrams across serial point-to-point links.
All valid protocols have the least significant bit of the least significant byte set to 1 and the least significant bit of the most significant byte is cleared to 0.
These protocols are used to establish and configure the communications link, the network layer protocols and also to encapsulate datagrams.
www.networksorcery.com /enp/protocol/ppp.htm   (759 words)

  
 rfc1661.txt
Simpson [Page 36] RFC 1661 Point-to-Point Protocol July 1994 Identifier On transmission, the Identifier field MUST be changed whenever the content of the Data field changes, and whenever a valid reply has been received for a previous request.
PPP Protocol field numbers are chosen such that some values may be compressed into a single octet form which is clearly distinguishable from the two octet form.
PPP Encapsulation The PPP encapsulation is used to disambiguate multiprotocol datagrams.
www.ietf.org /rfc/rfc1661.txt   (10454 words)

  
 Point-to-point tunneling protocol - Wikipedia, the free encyclopedia
The failure of PPTP as a VPN protocol is caused by cryptographic design errors in the Cisco LEAP and Microsoft MSCHAP-v2 handshake protocols, and by key length limitations in MPPE.
The PPTP protocol works by sending a regular PPP session to the peer with the Generic Routing Encapsulation (GRE) protocol.
PPTP is popular because it is easy to configure and it was the first VPN protocol that was supported by Microsoft Dial-up Networking.
en.wikipedia.org /wiki/Point-to-point_tunneling_protocol   (523 words)

  
 RFC 2637 (rfc2637) - Point-to-Point Tunneling Protocol
The protocol used to carry PPP protocol data units (PDUs) between the PAC and PNS, as well as call control and management is addressed by PPTP.
Enhanced GRE header The GRE header used in PPTP is enhanced slightly from that specified in the current GRE protocol specification [1,2].
The tunnel protocol is defined by a modified version of GRE [1,2].
www.faqs.org /rfcs/rfc2637.html   (11154 words)

  
 Point to Point Protocol (PPP)
PPP also established a standard for the assignment and management of IP addresses, asynchronous (start/stop) and bit-oriented synchronous encapsulation, network protocol multiplexing, link configuration, link quality testing, error detection, and option negotiation for such capabilities as network layer address negotiation and data-compression negotiation.
PPP also established a standard for assigning and managing IP addresses, asynchronous and bit-oriented synchronous encapsulation, network protocol multiplexing, link configuration, link quality testing, error detection, and option negotiation for added networking capabilities.
Data—Zero or more bytes that contain the datagram for the protocol specified in the protocol field.
www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/ppp.htm   (1207 words)

  
 IEEE 802.11
With high-gain external antennas, the protocol can also be used in fixed point-to-point arrangements, typically at ranges up to 8 kilometres (although some report success at ranges up to 80-120 km where line of sight can be established).
Extensions have been made to the 802.11b protocol (eg, channel bonding and burst transmission techniques) in order to increase speed to 22, 33, and 44 Mbit/s, but the extensions are proprietary and have not been endorsed by the IEEE.
Access point equipment which can support all these standards simultaneously is also available.
www.sciencedaily.com /encyclopedia/ieee_802_11   (1207 words)

  
 Point-to-point tunneling protocol - Wikipedia, the free encyclopedia
PPTP is popular because it is easy to configure and it was the first VPN protocol that was supported by Microsoft Dial-up Networking.
The PPTP protocol works by sending a regular PPP session to the peer with the Generic Routing Encapsulation (GRE) protocol.
PPTP is difficult to forward past a network firewall because it requires two network sessions.
en.wikipedia.org /wiki/Point-to-point_tunneling_protocol   (451 words)

  
 PPTP - Point to Point Tunneling Protocol
Abbreviation for Point To Point Tunneling Protocol.
Point-to-Point Tunneling Protocol, a more secure scheme of PPP, where the packets are encrypted before transmission.
Point-to-Point Tunneling Protocol, used in some Microsoft VPN implementations.
www.auditmypc.com /acronym/PPTP.asp   (587 words)

  
 What is PPP?
Point to Point Protocol (RFC1548 / RFC1549, 1332, 1333, 1334, 1551, 1376, 1377, 1378)
They're interesting only if you want to debug a connection with an ancient PPP implementation, and you're wondering why (e.g.) it asked you for IPCP option 2 with a length of only 4, and Compression-Type 0x0037.
Bring up a PPP interface and dial the phone when packets are queued for delivery; bring the interface down after some period of inactivity.
theory.cs.uni-bonn.de /ppp/part2.html   (537 words)

  
 The Point-to-Point Protocol
PPP achieves this by adding a protocol field to the basic HDLC frame that identifies the type of packet carried by the frame.
First, it can carry a large number of protocols and is thus not limited to the IP protocol.
For each of these capabilities, PPP has a separate protocol.
www.tldp.org /LDP/nag2/x-087-2-ppp.html   (550 words)

  
 PPP (Point-to-Point Protocol) (Linktionary term)
PPP is defined in RFC 1661 (The Point-to-Point Protocol, July 1994).
RFC 1547 (Requirements for an Internet Standard Point-to-Point Protocol, December 1993) provides historical information about the need for PPP and its development.
PPP predominates because it works with other protocols such as IPX and was designed to overcome problems with the earlier protocol.
www.linktionary.com /p/ppp.html   (205 words)

  
 High-Tech Dictionary Definition
(PPTP).A version of PPP (Point-to-Point Protocol) that has the ability to encapsulate packets of data formatted for one network protocol in packets used by another protocol.This tunneling technique allows TCP/IP data to be transmitted over a non-TCP/IP network.PPTP can be used to join different physical networks using the Internet as an intermediary.
www.computeruser.com /resources/dictionary/definition.html?lookup=5161   (52 words)

  
 Point-to-Point Tunneling Protocol (PPTP) FAQ : [Microsoft Windows NT Server 4.0; Point-To-Point Tunneling Protocol (PPTP); Virtual Private Networks (VPN); Secure Sockets Layer (SSL); firewall technology; PPTP encryption]
Because many ISPs are expected to upgrade their points of presence to support PPTP, you may soon be able to take advantage of PPTP through your ISP without having to change any setup in your client PC.
By tunneling PPP, we also enable the corporate LAN administrators to expediently add/remove network access for their employees without incurring delays if this access was managed centrally by the ISP.
MS-CHAP (PPP authentication) is used to validate the user credentials against Windows NT domains and the resulting session key is used to encrypt user data.
www.microsoft.com /ntserver/ProductInfo/faqs/PPTPfaq.asp   (2298 words)

  
 IntelĀ® Express 9500 Series Routers - Point-to-Point Protocol (PPP)
PPP is a standardized data connection level encapsulation protocol for communicating over leased lines, ISDN connections, dial-up modem connections, and Internet Tunnels.
PPP verifies, to some extent, that the PPP configurations in the two routers over the connection are consistent.
When the home connection needs to communicate with the office, they call in to the office router which then calls them back.
www.intel.com /support/express/routers/9500/sb/CS-012165.htm   (533 words)

  
 MPPE, Microsoft Point-To-Point Encryption Protocol
The Microsoft Point to Point Encryption scheme is a means of representing PPP packets in an encrypted form.
When MPPE is successfully negotiated by the PPP Compression Control Protocol, the value of this field is 0x00FD.
For example, if a packet contained the protocol type 0x002D (for a compressed TCP/IP header), the MPPE processor would first encrypt 0x002D and then it would encrypt the compressed Van-Jacobsen TCP/IP header.
www.networksorcery.com /enp/protocol/mppe.htm   (334 words)

  
 IEEE 802.11f - Wikipedia, the free encyclopedia
802.11f specifies a protocol between access points also known as the Inter-Access Point Protocol ( IAPP).
The base 802.11 standard does not specify subscriber mobility or roaming from one access point to another.
It handles the registration of APs within a network and the exchange of information when a user is roaming among coverage areas supported by different vendors' access points.
en.wikipedia.org /wiki/802.11f   (334 words)

  
 CITES Glossary
Within that domain are distinct hostnames (such as argus.cites.uiuc.edu) that point to individual computers on the campus network.
The protocol used determines the way errors are checked, the type of compression, the way the sender indicates the end of the transmission, and the way the receiver indicates that the message has been received.
Protocols can describe low-level details of machine-to-machine interfaces (e.g., the order in which bits and bytes are sent across a wire) or high-level exchanges between allocation programs (e.g., the way in which two programs transfer a file across the Internet).
www.cites.uiuc.edu /glossary   (334 words)

  
 WLAN: An invisible alternative - Tech Update - WLAN - Network Magazine India
It's based on a protocol called EAP (Extensible Authentication Protocol) which facilitates the authentication process between the authenticator (access point) and the suppliant (NIC of the user computer).
Unit shipments of 802.11-based wireless access points (devices for transmitting and receiving signals) totaled 1.8 million in 2001 and will rise to 4.5 million units in 2005.
The access point receives, buffers, and transmits data between the WLAN and the wired network infrastructure.
www.networkmagazineindia.com /200209/tech1.shtml   (334 words)

  
 te
An Access Point is a particular type of station that provides access to the DS, which is normally a wired LAN.
The Wireless Access Point delivers enhanced IEEE 802.1b high performance for up to 22mbps, which is double of that offered by standard 11mbps Access Point which use CCK modulation.
Access Point (AP) - Central point of shared access for wireless clients, analogous to the shared Ethernet hub in a wired environment.
www.reepham.org.uk /wlan.htm   (334 words)

  
 Recommendations for IEEE 802.11 Access Points
This is accomplished by passing an authentication key to the client and to the wireless access point as part of the authentication procedure.
Port-based network access control utilizes the physical characteristics of the switched LAN infrastructure to provide a means of authenticating devices attached to a LAN port, and for preventing access to that port in cases where the authentication process fails.
Limited network access, where the client has limited access to network resources, for example, client transmissions may be redirected to a different logical or physical network.
www.microsoft.com /whdc/device/network/802x/AccessPts.mspx   (334 words)

  
 fyi3.txt
This proposed protocol provides an IP/UDP bootstrap protocol which allows a diskless client machine to discover its own IP address, the address of a server host, and the name of a file to be loaded into memory and executed.
In addition, the handbook presents general information about the protocol standardization process itself, the agencies involved and their roles, and the means for obtaining further information.
This memo defines a simple protocol by which management information for a network element may be inspected or altered by logical remote users.
www.rediris.lkams.kernel.org /ftp/docs/network/fyi/fyi3.txt   (334 words)

  
 Summit Wireless: WEP Wifi Security Standard vs. Bluesocket
This prompts the access point to issue a WEP key to the mobile device that is valid only for that particular user, and to accept other types of traffic to and from the mobile device via a "controlled port".
Most access point vendors implemented their own proprietary IAPPs with the result that today seamless roaming between access points from different vendors is generally not possible.
Once access points support 802.11e there will still be a need for intermediate gateways, to provide end to end packet shaping.
www.summitwireless.net /security/wep/wep_vs_bluesocket.htm   (334 words)

  
 Page I
A protocol in the IP suite that allows a host to register its local network with the local router to receive any datagram sent to that router and targeted to a group with a specific IP multicast address.
An emerging multiple link state protocol, being developed as an extension to the PNNI ATM routing protocol.Used for route determination and distribution in hybrid LAN/ATM internetworks.
ICMP is a message control and error-reporting protocol between a host server and a gateway to the Internet.
www.glossary-tech.com /I.htm   (334 words)

  
 Atmel Announces 'Tap-Dance' - A Fast, Reliable Seamless Handover Protocol for WLAN Terminal Devices
Unlike other protocols that address L3 handovers, Tap-Dance's latency (time to reconnect and restore the original IP connection) is as low as 20 msec to 50 msec on average (under real traffic conditions), which is many times faster than other competing protocols.
Tap-Dance extends the capabilities of the 802.11f IAPP that is used for Layer 2 (L2) mobility management of STAs when roaming between Access Points (APs) inside their Home IP Network (HN).
Thus it requires no manual set-up, no reconfiguration or software upgrades to the STA, and no specific networking devices, that increase the network architecture cost, to control roaming.
www.forrelease.com /D20040204/sfw030.P1.02032004203934.22339.html   (334 words)

  
 Table of Contents for IAPP talk
IAPP: Inter-Access Point Protocol - 24 Sep 1997
web.it.kth.se /~ren/iapp3/Contents.html   (334 words)

  
 rfc2637.txt
Informational [Page 18] RFC 2637 Point-to-Point Tunneling Protocol (PPTP) July 1999 Error Code This field is set to 0 unless a "General Error" condition exists, in which case Result Code is set to 2 and this field is set to the value corresponding to the general error condition as specified in section 2.2.
Tunnel Protocol Operation The user data carried by the PPTP protocol are PPP data packets.
PPTP does not dictate the particular algorithms to be used for this low level control but it does define the parameters that must be communicated in order to allow such algorithms to work.
ietf.org /rfc/rfc2637.txt   (11165 words)

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