VMware 3V0-25.25 Practice Test 72
Question 710
A reviewer must validate the intended NSX outcome. Situation: Two Edge nodes protect the same Tier-0 but run on one physical ESXi host. Which result most directly demonstrates that the team can maintain gateway availability after a host hardware failure?
- The failed next hop is withdrawn and traffic resumes through a healthy peer.
- During a controlled host shutdown the gateway remains available through an independent Edge path.
- After appropriate capacity repair, Edge resource counters and packet loss return within targets.
- A sized test packet succeeds end-to-end without fragmentation or unexpected drops.
Explanation
Correct Answer
B:During a controlled host shutdown the gateway remains available through an independent Edge path. This observation validates the specified ha fault-domain design outcome. Logical HA cannot survive the failure of a single shared physical dependency.
Incorrect Answers
A:This would validate peer loss convergence rather than the needed ha fault-domain design result. Fast liveness detection and route recomputation determine how quickly traffic leaves a failed path. For the present case, the evidence must show that the team can maintain gateway availability after a host hardware failure.
C:This would validate edge resource exhaustion rather than the needed ha fault-domain design result. A saturated Edge can lose traffic even with a healthy routing control plane. For the present case, the evidence must show that the team can maintain gateway availability after a host hardware failure.
D:This would validate transport mtu blackhole rather than the needed ha fault-domain design result. A tunnel adds headers, so an underlay MTU mismatch often affects large frames first. For the present case, the evidence must show that the team can maintain gateway availability after a host hardware failure.
Question 711
An architect proposes the following step: compare identical traffic mixes and record throughput, latency, loss and CPU before and after. The context is: An engineer claims a firewall acceleration tweak improved packets per second but changed workload mixes between tests. What is the strongest technical reason for that decision?
- Address governance prevents collisions and improves connectivity planning for cross-instance management.
- Version compatibility matters because Federation control objects and realization depend on supported Manager combinations.
- Controlled test methodology is necessary to distinguish genuine datapath improvements from variable workloads.
- Teaming and path configuration determine which physical links can carry transport traffic.
Explanation
Correct Answer
C:Controlled test methodology is necessary to distinguish genuine datapath improvements from variable workloads. This explains the proposed decision in the current reproducible optimization situation. The intended outcome is to validate a performance change using controlled measurements, and verification would show: The same synthetic traffic profile shows a repeatable improvement with stable test conditions.
Incorrect Answers
A:This statement can describe a management address governance problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to preserve unique routable management addressing for each VCF instance; here the relevant requirement is to validate a performance change using controlled measurements.
B:This statement can describe a version compatibility problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to align the software versions required for supported Federation operations; here the relevant requirement is to validate a performance change using controlled measurements.
D:This statement can describe a uplink path diversity problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to use redundant suitable transport uplinks according to fabric and policy constraints; here the relevant requirement is to validate a performance change using controlled measurements.
Question 712
A reviewer must validate the intended NSX outcome. Situation: A new Tier-0 has no external interface and must peer with physical leaf routers. Which result most directly demonstrates that the team can establish the Tier-0 external service-router interface?
- The Tier-1 route table shows unique network destinations for both segments.
- A complete workload flow and return packet trace succeed across the gateway.
- Unhealthy backends stop receiving new eligible traffic through the virtual service.
- The gateway can reach upstream neighbor IP addresses from its external interface.
Explanation
Correct Answer
D:The gateway can reach upstream neighbor IP addresses from its external interface. This observation validates the specified tier-0 uplink creation outcome. The external interface enables IP adjacency between the gateway and physical fabric.
Incorrect Answers
A:This would validate segment ip subnet plan rather than the needed tier-0 uplink creation result. Overlapping directly connected networks in one route context can produce ambiguous traffic delivery. For the present case, the evidence must show that the team can establish the Tier-0 external service-router interface.
B:This would validate tier-0 deployment smoke test rather than the needed tier-0 uplink creation result. A neighbor state alone cannot prove guest routes, policy, NAT and return path are correct. For the present case, the evidence must show that the team can establish the Tier-0 external service-router interface.
C:This would validate avi load-balancer service rather than the needed tier-0 uplink creation result. Avi adds application-aware balancing and backend health handling beyond ordinary IP routing. For the present case, the evidence must show that the team can establish the Tier-0 external service-router interface.
Question 713
An architect proposes the following step: search the configured central NSX log collection for peer, service and transport events. The context is: A network outage recurs overnight and no operator is online to observe it. What is the strongest technical reason for that decision?
- Retained logs allow investigators to sequence transient faults after live status has recovered.
- A tunnel adds headers, so an underlay MTU mismatch often affects large frames first.
- Modern NSX supports stateful services on eligible active-active Tier-0 designs, subject to documented feature limitations.
- Cross-layer path analysis helps locate gaps outside a single NSX Manager inventory.
Explanation
Correct Answer
A:Retained logs allow investigators to sequence transient faults after live status has recovered. This explains the proposed decision in the current central log correlation situation. The intended outcome is to reconstruct time-stamped NSX events after the fact, and verification would show: Log entries show event times and component identities correlated with the reported impact.
Incorrect Answers
B:This statement can describe a transport mtu blackhole problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to remove encapsulation-induced packet loss on the physical path; here the relevant requirement is to reconstruct time-stamped NSX events after the fact.
C:This statement can describe a stateful active-active support problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to select a valid HA architecture for required stateful services; here the relevant requirement is to reconstruct time-stamped NSX events after the fact.
D:This statement can describe a vcf operations for networks path problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to correlate virtual and physical network dependencies for the application; here the relevant requirement is to reconstruct time-stamped NSX events after the fact.
Question 714
A reviewer must validate the intended NSX outcome. Situation: High-volume external traffic must use several equal-cost next hops rather than a single saturated gateway path. Which result most directly demonstrates that the team can distribute eligible north-south flows across redundant paths?
- Architecture diagrams show management interactions independently from tunnel, routing, and service flows.
- Observed independent flows use multiple live next hops while each flow stays consistent with its path selection.
- Correlated application and network timings reveal which hop contributes the new delay.
- Remote tunnel endpoints are reachable and cross-site encapsulated frames traverse the intersite network.
Explanation
Correct Answer
B:Observed independent flows use multiple live next hops while each flow stays consistent with its path selection. This observation validates the specified ecmp load spread outcome. ECMP selects among equal-cost routes, typically per flow, improving aggregate path capacity and redundancy.
Incorrect Answers
A:This would validate control and data plane separation rather than the needed ecmp load spread result. NSX management and policy control govern desired state, while transport nodes and Edge gateways process actual packets. For the present case, the evidence must show that the team can distribute eligible north-south flows across redundant paths.
C:This would validate latency baseline rather than the needed ecmp load spread result. A comparable baseline distinguishes network forwarding delay from application processing or storage latency. For the present case, the evidence must show that the team can distribute eligible north-south flows across redundant paths.
D:This would validate remote tunnel reachability rather than the needed ecmp load spread result. Stretched-segment traffic requires a functional intersite tunnel data path; local same-site forwarding alone is insufficient. For the present case, the evidence must show that the team can distribute eligible north-south flows across redundant paths.
Question 715
A reviewer must validate the intended NSX outcome. Situation: A network outage recurs overnight and no operator is online to observe it. Which result most directly demonstrates that the team can reconstruct time-stamped NSX events after the fact?
- The affected host shows the failing TEP or transport configuration and a clear health transition.
- The affected host's settings match the approved profile and transport status recovers.
- Log entries show event times and component identities correlated with the reported impact.
- Approved clients reconnect with certificate validation enabled.
Explanation
Correct Answer
C:Log entries show event times and component identities correlated with the reported impact. This observation validates the specified central log correlation outcome. Retained logs allow investigators to sequence transient faults after live status has recovered.
Incorrect Answers
A:This would validate transport health diagnostics rather than the needed central log correlation result. NSX transport-node telemetry directly describes local tunnel readiness and realization errors. For the present case, the evidence must show that the team can reconstruct time-stamped NSX events after the fact.
B:This would validate host profile drift rather than the needed central log correlation result. A profile mismatch can break a single node even when Manager-wide logical segments are correct. For the present case, the evidence must show that the team can reconstruct time-stamped NSX events after the fact.
D:This would validate certificate expiration fault rather than the needed central log correlation result. An expired or untrusted management certificate blocks TLS clients independently of network IP reachability. For the present case, the evidence must show that the team can reconstruct time-stamped NSX events after the fact.
Question 716
A security team wants per-VM east-west filtering even when two workloads share a hypervisor. The engineering team needs to enforce security near workload virtual interfaces. What action best addresses the immediate requirement?
- connect the segments to a Tier-1 gateway linked toward the Tier-0
- track Edge CPU, throughput and service capacity per instance before expansion
- align TEP reachability and physical fabric topology with host placement
- apply NSX distributed firewall policies to the matching workload groups
Explanation
Correct Answer
D:The distributed firewall evaluates relevant flows at the host data plane rather than relying on traffic crossing a physical perimeter. The selected action, apply NSX distributed firewall policies to the matching workload groups, directly supports the specified goal to enforce security near workload virtual interfaces. A useful confirmation is: Rule-hit and flow records show policy enforcement on VM-to-VM traffic that never leaves the host.
Incorrect Answers
A:Connect the segments to a Tier-1 gateway linked toward the Tier-0 would address the separate case of tier-1 workload routing, where the objective is to provide workload-segment routing behind an external connectivity tier. Tier-1 provides application-facing logical routing and a route toward a Tier-0 for external networks. Here the requirement is instead to enforce security near workload virtual interfaces; that step does not directly satisfy it.
B:Track Edge CPU, throughput and service capacity per instance before expansion would address the separate case of capacity planning, where the objective is to size future network services from measured demand and headroom. Fleet capacity decisions should use real workload demand and supported Edge sizing rather than only counting instances. Here the requirement is instead to enforce security near workload virtual interfaces; that step does not directly satisfy it.
C:Align TEP reachability and physical fabric topology with host placement would address the separate case of host transport locality, where the objective is to lower tunnel RTT and reduce needless underlay hops. An efficient routed fabric and appropriate endpoint placement reduce overlay transport detours. Here the requirement is instead to enforce security near workload virtual interfaces; that step does not directly satisfy it.
Question 717
An architect proposes the following step: configure a supported IPsec VPN service with matching proposals and routes. The context is: A corporate site needs encrypted IP connectivity to a remote partner over an untrusted transport. What is the strongest technical reason for that decision?
- IPsec negotiates security associations and encrypts traffic for the agreed protected networks.
- An Edge appliance must be prepared as a transport node before it can provide intended gateway data-plane services.
- Stateful inspection distinguishes traffic belonging to established sessions from unauthorized new attempts.
- Tenant offboarding should clean scoped objects while leaving shared routing and provider services intact.
Explanation
Correct Answer
A:IPsec negotiates security associations and encrypts traffic for the agreed protected networks. This explains the proposed decision in the current ipsec vpn connectivity situation. The intended outcome is to protect data in transit between controlled gateway endpoints, and verification would show: Tunnel state and protected-subnet probes confirm matching peer, encryption and routing configuration.
Incorrect Answers
B:This statement can describe a edge transport preparation problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to complete the NSX transport-node realization of the Edge; here the relevant requirement is to protect data in transit between controlled gateway endpoints.
C:This statement can describe a stateful gateway policy problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to permit only authorized new sessions while retaining state-aware replies; here the relevant requirement is to protect data in transit between controlled gateway endpoints.
D:This statement can describe a tenant lifecycle cleanup problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to remove the retired tenant without affecting shared provider infrastructure; here the relevant requirement is to protect data in transit between controlled gateway endpoints.
Question 718
A change review examines the following situation: Two application VMs share one logical segment and one ESXi host and exchange unicast frames. Which practice would most directly undermine the requirement to describe local same-segment forwarding without unnecessary routing hops?
- assuming the packet leaves directly from the VM overlay switch into physical BGP without routing tiers
- placing the Tier-0 service router in every local Layer-2 packet path
- permanently disabling TLS certificate checks to bypass the expired identity
- troubleshooting only the application service port while the host tunnel dataplane is down
Explanation
Correct Answer
B:The anti-pattern, placing the Tier-0 service router in every local Layer-2 packet path, directly conflicts with the requirement to describe local same-segment forwarding without unnecessary routing hops. Same-segment local unicast switching need not traverse Tier-1, Tier-0 or an Edge service router. The safer action is to trace the VM vNICs through local NSX logical switching and relevant host security checks.
Incorrect Answers
A:That practice primarily harms the distinct north-south packet walk activity, in which the goal is to describe the sequence from tenant segment to physical network. Its failure mechanism is less direct for this specific same-host same-segment packet walk review. Here the key requirement is to describe local same-segment forwarding without unnecessary routing hops.
C:That practice primarily harms the distinct certificate expiration fault activity, in which the goal is to repair management-plane trust without disabling authentication protections. Its failure mechanism is less direct for this specific same-host same-segment packet walk review. Here the key requirement is to describe local same-segment forwarding without unnecessary routing hops.
D:That practice primarily harms the distinct transport health diagnostics activity, in which the goal is to inspect the host's NSX transport configuration and runtime state. Its failure mechanism is less direct for this specific same-host same-segment packet walk review. Here the key requirement is to describe local same-segment forwarding without unnecessary routing hops.
Question 719
A reviewer must validate the intended NSX outcome. Situation: A shared gateway should resolve internal company zones using private DNS and other names using public recursive servers. Which result most directly demonstrates that the team can route DNS queries to the appropriate upstream DNS authority?
- Valid outbound requests and their replies pass; unmatched inbound connection attempts are denied.
- During the controlled Edge failure, approved paths and policies remain functional.
- Internal domain queries reach corporate DNS; unrelated domains reach the default resolvers.
- Log entries identify the BGP neighbor and time its state transitioned.
Explanation
Correct Answer
C:Internal domain queries reach corporate DNS; unrelated domains reach the default resolvers. This observation validates the specified dns forwarder domain split outcome. A DNS forwarder can select named zone resolvers instead of sending every query to one list.
Incorrect Answers
A:This would validate stateful gateway policy rather than the needed dns forwarder domain split result. Stateful inspection distinguishes traffic belonging to established sessions from unauthorized new attempts. For the present case, the evidence must show that the team can route DNS queries to the appropriate upstream DNS authority.
B:This would validate remote-site failover test rather than the needed dns forwarder domain split result. Federation enrollment is distinct from validated data-plane resilience. For the present case, the evidence must show that the team can route DNS queries to the appropriate upstream DNS authority.
D:This would validate centralized logs rather than the needed dns forwarder domain split result. Time-ordered logs can show routing state changes and related process errors more precisely than an aggregate green/red health icon. For the present case, the evidence must show that the team can route DNS queries to the appropriate upstream DNS authority.
Question 720
An architect proposes the following step: align the NSX VLAN segment tag with the physical trunk allowed VLANs. The context is: A VLAN-backed Edge uplink cannot ARP its directly attached router despite correct IP addresses. What is the strongest technical reason for that decision?
- An expired or untrusted management certificate blocks TLS clients independently of network IP reachability.
- VCF 9 VPC routes may depend on the explicit TGW static redistribution class.
- Modern NSX supports stateful services on eligible active-active Tier-0 designs, subject to documented feature limitations.
- A VLAN mismatch prevents local neighbor discovery before routing protocols can operate.
Explanation
Correct Answer
D:A VLAN mismatch prevents local neighbor discovery before routing protocols can operate. This explains the proposed decision in the current fabric vlan mismatch situation. The intended outcome is to restore Layer-2 adjacency on the correct external uplink VLAN, and verification would show: The Edge and leaf exchange neighbor traffic after the trunk/VLAN alignment.
Incorrect Answers
A:This statement can describe a certificate expiration fault problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to repair management-plane trust without disabling authentication protections; here the relevant requirement is to restore Layer-2 adjacency on the correct external uplink VLAN.
B:This statement can describe a transit gateway route missing problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to advertise Transit Gateway routes required for VPC external access; here the relevant requirement is to restore Layer-2 adjacency on the correct external uplink VLAN.
C:This statement can describe a stateful active-active support problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to select a valid HA architecture for required stateful services; here the relevant requirement is to restore Layer-2 adjacency on the correct external uplink VLAN.