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 “Two specific Network Function vNICs must be created, one for inbound traffic and the other for outbound traffic.”. Service insertion introduces an additional dataplane hop through a network function VM. That makes correct vNIC pairing, health monitoring, and MTU sizing essential, because steering can fail even when the firewall appliance itself appears powered on. This is a Flow policy design question, so categories, secured entities, rule direction, policy mode, and policy precedence matter more than simple IP connectivity assumptions. A strong exam habit is to ask which Nutanix construct would have to change for the symptom or requirement to change. That mental shortcut usually separates the real answer from distractors that mention generic networking steps, disruptive resets, or unrelated configuration objects. Notice that B does not fit because it targets a different layer of the Nutanix networking and security stack than the one causing the outcome here. C does not fit because it targets a different layer of.