An administrator finds that App tier VMs cannot connect to the Database tier on port...

A reliable method here is to translate the scenario into Nutanix terms—VPC routing, external connectivity, policy scope, identity mapping, or upgrade readiness—and then choose the answer that directly addresses that domain. The correct response is A, meaning “Update the microsegmentation policy in Nutanix Flow to allow App - > Database traffic on port 3306.”. The winning option is the one tied to the native Nutanix object or control that governs the outcome described in the scenario. From a troubleshooting standpoint, the validation path is policy scope first, then categories or identity mapping, then hitlog evidence, service definition, and finally policy precedence.

In other words, this is less about broad infrastructure suspicion and more about finding the exact Nutanix decision point that explains the behavior. Notice that B is a disruptive action and does not address the actual control-plane or policy requirement being tested. C does not fit because it targets a different layer of the Nutanix networking and security stack than the one causing the outcome here. For exam preparation, remember that Nutanix usually separates discovery from enforcement, routing from NAT, and access policy from identity mapping. Choosing the layer that truly owns the function is what leads to the right answer.