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TOPIC: How is ppp session established.

How is ppp session established. 10 years 5 months ago #15164

  • MANPAP
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Hi,

Can anyone tell me how a PPP session is established? I mean, say for example I connect to my ISP using dial up connection, a small dialog box appears asking for my user name and password.

I want to know what exactly happens when I type my correct user name and password and how is a session established.

Thanks in advance

Cheers,
-Manjunath
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Re: How is ppp session established. 10 years 5 months ago #15167

  • nske
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That would be RFC-1661.

Like described, PPP is a suite of protocols that takes care of the following, using the related individual protocol:

- Checks the integrity of the medium -i.e. phone line- (LCP)
- Authenticates (PAP/CHAP)
- Assigns an IP address to your end (IPCP)
- Negotiates a few other properties, like maximum packet size and compression -distinguishable through it's header fields- and encapsulates all data for the connection session.
- Negotiates disconnection

A few other resources:
en.wikipedia.org/wiki/Point-to-Point_Protocol
www.tcpipguide.com/free/t_PPPProtocolFrameFormats.htm
www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/ppp.htm

There are much more of course, try googling for "point to point protocol" (including the quotation marks).
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