When a fault occurs, the fault can be classified to reduce the scope of fault location. Which of the following is not an interface configuration fault?

When a fault occurs, the fault can be classified to reduce the scope of fault location. Which of the following is not an interface configuration fault?
A . The duplex modes of the interfaces at both ends are inconsistent
B. IP address conflict
C. Inconsistent interface authentication
D. Inconsistent luminous power received at both ends

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Answer: D