Which of the following mitigations would be BEST for the security manager to implement while maintaining alerting capabilities?

A large industrial system’s smart generator monitors the system status and sends alerts to third-party maintenance personnel when critical failures occur. While reviewing the network logs the company’s security manager notices the generator’s IP is sending packets to an internal file server’s IP .

Which of the following mitigations would be BEST for the security manager to implement while maintaining alerting capabilities?
A . Segmentation
B . Firewall whitelisting
C . Containment
D . isolation

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Answer: A