Considering that the config files are the same, which of the following is the MOST likely cause of the failure?

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A technician attempts to replace a switch with a new one of similar model from the same vendor. When the technician moves the fiber and SFP plug, the switch does not completely boot up.

Considering that the config files are the same, which of the following is the MOST likely cause of the failure?
A . Damaged fiber
B . Corrupted operating system
C . VLAN mismatch
D . Bad port

Answer: B