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PPP is
designed for two-way networking. The TCP/IP protocol suite moves the data.
If you couldn??™t really conceive of Linux as a successful operating system without the
Internet, why was it so hard to set up a dial-up connection in Linux? It??™s true that Unix
(and its Linux cousin) was network-aware from the very beginning, but these were
assumed to be machines networked with wires and cards that could have static IP
CHAPTER 12 Connecting to the Internet 250
addresses. These workstations were located at research universities, corporate offices, and
science labs, where users might log off the network, but the computer would always be
there. Unix (and Linux) wasn??™t ready for computers that had intermittent connections.
The protocols for personal computers to connect were kludged together and eventually
made to work.
You may not need to entirely understand PPP anymore to dial up to the Internet, but
following is a quick primer.
Setting up a dial-up connection is really installing the pppd daemon on your system. This
daemon controls the use of PPP.


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