What is an advantage of designing an out-of-band network management solution?

What is an advantage of designing an out-of-band network management solution?
A . In the event of a production network outage, network devices can still be managed.
B . There is no separation between the production network and the management network.
C . In the event of a production network outage, it can be used as a backup network path.
D . It is less expensive than an in-band management solution

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Answer: A