A ppp frame include a fcs which is a crc

To separate one frame from the next, an 8-bit flag is added at the beginning and the end of a frame.Д«yte stuffing is the process of adding one extra byte whenever there is a flag or escape character in the text.Д«it-Oriented Framing: the data section of a frame is a sequence of bits to be interpreted by the upper layer. The header, which normally carries the source and destination addresses and other control information, and the trailer, which carries error detection redundant bits, are also multiples of 8 bits. There are two approaches:Д¬haracter-Oriented Framing: data to be carried are 8-bit characters from a coding system such as ASCII. variable-size framing needs to define the end of one frame and the beginning of the next.fixed-size framing is no need for defining the boundaries of the frames the size itself can be used as a delimiter.The destination address defines where the packet is to go the sender address helps the recipient acknowledge the receipt. FramingДЇraming in the data-link layer separates a message from one source to a destination by adding a sender address and a destination address. Data link control functions include framing and flow and error control.

The data link control (DLC) deals with procedures for communication between two adjacent nodes-node-to-node communication (no matter whether the link is dedicated or broadcast). Chapter 11: Data Link Control (DLC) DLC Services

A ppp frame include a fcs which is a crc