When troubleshooting a network fault, you locate the fault location on a router. This router and another router in the network are mutually redundant. Then which of the following troubleshooting methods is most suitable?

When troubleshooting a network fault, you locate the fault location on a router. This router and another router in the network are mutually redundant. Then which of the following troubleshooting methods is most suitable?
A . Comparative configuration method
B . Bottom-up approach
C . Confirm business traffic path
D . Top-down method

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Answer: A