A protocol for communication between two computers using a serial interface, typically a computer connected by phone line to a server. For example, your Internet service provider may provide you with a Point-to-Point Protocol (PPP) connection so that the provider’s server can respond to your requests, pass them on to the Internet, and forward your requested Internet responses back to you. PPP uses IP (and is designed to handle others). It is sometimes considered a member of the TCP/IP suite of protocols. Relative to the OSI reference model, PPP provides layer 2 (data-link layer) service. Essentially, it packages your computer TCP/IP packets and forwards them to the server where they can be placed on the Internet.