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The termination resistors on a CAN bus are fitted

  • A.one at every node on the bus
  • B.one at the master node alone
  • C.only when the bus exceeds one hundred metres
  • D.one at each end of the bus, not at every node

Answer: D

Two 120 ohm resistors, one at each physical extremity, match the cable and suppress reflections; fitting one at every node loads the bus until no transceiver can drive it. Stub lengths from the backbone to each node also have to be kept short.

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