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PPP Fundamentals and Operation
The problem with the Serial Line
Internet Protocol was that it was too simple and didn't include enough
features. As the saying goes, be careful what you wish for,
especially when the complaint is too much simplicity.
J The Point-to-Point
Protocol (PPP) corrects the lack of features in SLIP, but you could
figure out, without really trying, what the cost is: significantly more
complexity. Where the operation of SLIP can be explained in a few paragraphs,
PPP is much more involved, including a number of specific processes
that need to be explained.
Before discussing the individual
protocols that comprise PPP, I want to take a high-level look at the
protocol suite. I start with an overview, history and discussion of
the benefits of PPP. I provide a high-level breakdown of the main components
of the PPP suite, and a general description of how PPP operates. I then
describe the steps involved in setting up and configuring a link, and
the phases a PPP link passes through during its lifetime.
Finally, I categorize and list the standards that define different aspects
of PPP's functionality.
Note: I describe the operation of PPP before the standards that define it, which is different than the order used in most other sections in this Guide. I felt that in this case, the groupings used to list the standards would make more sense coming after the description of the PPP suite components and its overall operation.
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The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005
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