Protocol used for dial up connections to the Internet. Used by AT&T Worldnet(R) Services for dial up connections to the service.
A protocol that allows a computer to use a regular telephone line and a modem to make a TCP/IP connection and thus be really and truly on the Internet. PPP has pretty much replaced SLIP- Serial Line Internet Protocol (an older protocol used for the same purpose.)
Protocol that handles the sending of data packets over dial-up and leased-line connections to your ISP. PPP gets you online.