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Which diagnostic technique applies to an optical network?

  • A.Substituting a loop connector at each node in turn, which restores the ring and identifies the faulty section
  • B.Bypassing nodes in turn to locate the break
  • C.Measuring the resistance of the ring, which reveals the point at which the continuity has been interrupted
  • D.A visual inspection

Answer: B

A loop connector closes the ring at a node and identifies which section is broken. The last option describes exactly that technique, which makes it a correct and more specific version. Resistance measurement is meaningless on fibre. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. The shared behaviour explains why these belong together and the differences explain why both exist.

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