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Which extension increases the payload and speed of a controller area network?

  • A.A variant that switches to a higher bit rate during the data field and carries up to sixty four bytes per message
  • B.Flexible data rate operation
  • C.Extended identifiers, which increase the number of messages that may be distinguished upon the network in use
  • D.Higher voltage

Answer: B

Flexible data rate raises the rate during the payload and extends it from eight to sixty four bytes. The last option describes exactly that, which makes it a correct and more detailed version. Extended identifiers are a separate earlier extension. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb.

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