Dip handles the connections needed for dialup IP
links, like SLIP or PPP. It can handle both
incoming and outgoing connections, using password
security for incoming connections. It has a
command mode (an interactive program to set up an
outgoing IP connection), dialout mode (interprets
chat script to dial out and open an IP
connection), and dialin mode (login shell for
handling incoming IP connections, as in dialup
SLIP and PPP connections).
