The most up-to-date values of the protocol field are specified in the most recent Assigned Numbers Request For Comments (RFC). Protocol - Two bytes that identify the protocol encapsulated in the information field of the frame. A connectionless link service similar to that of Logical Link Control (LLC) Type 1 is provided. Control - A single byte that contains the binary sequence 00000011, which calls for transmission of user data in an unsequenced frame. PPP does not assign individual station addresses. Address - A single byte that contains the binary sequence 11111111, the standard broadcast address. The flag field consists of the binary sequence 01111110.
Flag - A single byte that indicates the beginning or end of a frame. The following descriptions summarize the PPP frame fields illustrated in Figure 3.6
The PPP frame format appears in the Figure Shown below: A family of NCPs for establishing and configuring different network layer protocols An extensible LCP to establish, configure, and test the connection
The ppp frame format serial#
A method for encapsulating datagrams over serial links PPP provides a method for transmitting datagrams over serial point-to-point links, which include the following three components: PPP supports these functions by providing an extensible Link Control Protocol (LCP) and a family of Network Control Protocols (NCPs) to negotiate optional configuration parameters and facilities.PPP also established a standard for the assignment and management of IP addresses, asynchronous (start/stop) and bit-oriented synchronous encapsulation, network protocol multiplexing, link configuration, link quality testing, error detection, and option negotiation for such capabilities as network layer address negotiation and data-compression negotiation.The Point-to-Point Protocol (PPP) originally emerged as an encapsulation protocol for transporting IP traffic over point-to-point links.
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