H ELECTRICITY
H04 ELECTRIC COMMUNICATION TECHNIQUE
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L12/00 Data switching networks
H04L12/28 characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
H04L2012/40208 characterized by the use of a particular bus standard
H04L2012/40215 Controller Area Network CAN