Name
PPP — PPP (point-to-point protocol) support
PPP (Point to Point Protocol) sends Internet traffic over telephone (and other serial) lines. Ask your access provider if they support it, because otherwise you can't use it. An older protocol with the same purpose is called SLIP. Most Internet access providers these days support PPP rather than SLIP.
To use PPP, you need an additional program called pppd as described in the PPP-HOWTO, available at http://www.tldp.org/docs.html#howto. Make sure that you have the version of pppd recommended in Documentation/Changes. The PPP option enlarges your kernel by about 16 KB.
There are actually two versions of PPP: the traditional PPP for
asynchronous lines, such as regular analog phone lines, and
synchronous PPP, which can be used over digital ISDN lines for
example. If you want to use PPP over phone lines or other asynchronous
serial lines, you need to enable the PPP
support for async serial ports option.
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