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The concept of sending extra bits for use in error detection is called

  • A.Redundancy
  • B.Detection
  • C.Correction
  • D.Duplication

Answer: D

Correct answer: Redundancy

Error detection works by sending more bits than the message strictly needs, so that a corrupted message no longer fits the pattern. That surplus is called redundancy, and parity bits, checksums and CRCs are all ways of adding it.

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