![]() Contents defined in the data link layer (layer 2) As described in “High-speed and reliable data sharing” in Features of CAN, the function to retransmit data when a transmission error occurs, called “permanent retry,” corresponds to this layer. The transport layer only defines retransmission control. OSI basic reference model Software controlĬontents defined in the transport layer (layer 4) The CAN protocol has specifications for the transport, data link, and physical layers in the OSI basic reference model. ![]() ![]() In the OSI reference model, the functions used for computer communication have been divided into a layered structure by the ISO. CAN and other information and communication standards have been standardized on the basis of the OSI basic reference model stipulated by the ISO. Just like the same language is used during conversation, common language and rules need to be defined for information and communication. Download PDF What is the OSI basic reference model?
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