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# Serial Line IP

The serial line protocols, SLIP and PPP, provide the Internet connectivity for the poor. Apart from a modem and a serial board equipped with a FIFO-buffer, no hardware is needed. Using it is not much more complicated than a mailbox, and an increasing number of private organizations offer dial-up IP at an affordable cost to everyone.

There are both SLIP and PPP drivers available for . SLIP has been there for quite a while, and works fairly reliable. A PPP driver has been developed recently by Michael Callahan and Al Longyear. It will be described in the next chapter.

- General Requirements
- SLIP Operation
- Using dip
  - A Sample Script
  - A dip Reference
    - The Modem Commands
    - echo and term
    - The get Command
    - The print Command
    - Variable Names
    - The if and goto Commands
    - send, wait and sleep
    - mode and default
- Running in Server Mode