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Which action does a node take on detecting an error?

  • A.It transmits an error frame and the message is repeated
  • B.It ignores the message, which is then retransmitted by the sending node after a defined interval has elapsed
  • C.Nothing
  • D.It signals the error to every other node, causing the frame to be discarded and the transmitter to try again

Answer: A

Any node detecting an error destroys the frame with an error flag and the sender retries. The last option describes exactly that sequence, which makes it a correct and fuller version of the same answer. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Checking which component actually carries the load settles most questions of this kind at once. A single measurement chosen to respond to the one asymmetry beats several that respond to shared behaviour.

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