MAC frame without the beginning and end of the said data and PPP frame has a start and end because the MAC frame is used in Ethernet, and Ethernet csma/CD protocol make if the receiver can accept data to ensure the bus must be only one MAC frame, or conflict, so if the voltage is 0 transfer finished, so there's no like the PPP frame has the beginning and end of a data signal, and the PPP frame is used in a wide area network, multiple computers in the line to the ISP to send data, when I was in a need to know where is the beginning of the data is the end of the data, because there are a lot of data sent at the same time, so with the beginning and end of a data byte, said the above, please understand, right

CodePudding user response:

Also has an Ethernet frame header, called preamble, see https://en.wikipedia.org/wiki/Ethernet_frame

CodePudding user response:

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