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A CAN node that detects an error

  • A.requests a retransmission from the original sender alone
  • B.removes itself from the bus permanently
  • C.transmits an error frame so every node discards the message
  • D.silently ignores the message and continues

Answer: C

Global signalling keeps every node's view of the traffic consistent, and the transmitter then retries automatically. Persistent errors raise a node's error counters until it takes itself off the bus, which is the bus-off state.

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