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