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7
Point-to-Point Protocol
(PPP)
Introduction
Point-To-Point Protocol is designed for simple links which transport
packets between two peers. These links provide full-duplex
simultaneous bi-directional operation, and are assumed to deliver
packets in order. PPP is intended to provide a common solution for
easy connection for a wide variety of hosts, bridges and routers.
In the process of configuring, maintaining and terminating the
point-to-point link, PPP goes through several distinct phases which
are specified in the following simplified state diagram:
Dead
Down
Figure 7-1 Point to Point Link Pathway
44 Point-to-Point Protocol (PPP)
Up
Establish
Fail
Terminate
Opened
Authetication
Fail
Closing
Network
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