PPP (Point-to-Point Protocol), is the most widely used method for transporting IP packets over a serial link between the user and the Internet Service Provider (ISP).
Although PPP is primarily used over dialup lines, variants such as PPoE (PPP over Ethernet) and PPoA (PPP over ATM) extend PPP to new data-link layer protocols.
PPP was designed to enable the transmission of different protocols over one point-to-point link by utilizing encapsulation. Encapsulation is the process of storing packets from the foreign protocol inside PPP frames.
In addition to this encapsulation function, PPP also provides:
• A Link Control Protocol (LCP) for establishing, configuring, and testing the data-link connection.
• A suite of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols.
Posted by: Wasim Javed
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