VMware 3V0-25.25 Practice Test 78
Question 770
The WAN team needs rapid detection of a failed external link beyond default protocol detection. The engineering team needs to shorten supported route-failure detection time. What action best addresses the immediate requirement?
- configure a Tier-0 local AS and peer details matching the upstream router
- configure suitable BFD and BGP session behavior with peer support
- apply appropriate NSX DFW groups and policy for the segment's workloads
- replace affected credentials in a controlled rotation and update dependent services
Explanation
Correct Answer
B:BFD can detect dataplane liveness failure faster and trigger routing convergence where supported. The selected action, configure suitable BFD and BGP session behavior with peer support, directly supports the specified goal to shorten supported route-failure detection time. A useful confirmation is: A controlled link drop is reflected promptly in peer and routing health states.
Incorrect Answers
A:Configure a Tier-0 local AS and peer details matching the upstream router would address the separate case of bgp asn configuration, where the objective is to establish correct BGP neighbor identity and session parameters. A valid BGP session needs compatible neighbor reachability and AS configuration. Here the requirement is instead to shorten supported route-failure detection time; that step does not directly satisfy it.
C:Apply appropriate NSX DFW groups and policy for the segment's workloads would address the separate case of segment security placement, where the objective is to ensure connecting a VM to a segment does not bypass microsegmentation policy. Logical network membership alone is not a substitute for workload-level access control. Here the requirement is instead to shorten supported route-failure detection time; that step does not directly satisfy it.
D:Replace affected credentials in a controlled rotation and update dependent services would address the separate case of credential rotation, where the objective is to rotate secrets while preserving authorized NSX integrations. Credential handling must address exposure without leaving broken or unknown access paths. Here the requirement is instead to shorten supported route-failure detection time; that step does not directly satisfy it.
Question 771
A change review examines the following situation: A multi-site design currently sends all local internet traffic to a distant site even when local exits exist. Which practice would most directly undermine the requirement to reduce unnecessary intersite traffic for site-local workloads?
- relying only on a single local site snapshot as a complete Global Manager recovery plan
- backhauling every inter-segment packet through the remote Edge cluster
- forcing all regional workloads through one distant Edge without a business reason
- scheduling both redundant site-edge upgrades in the same outage window without a rollback plan
Explanation
Correct Answer
C:The anti-pattern, forcing all regional workloads through one distant Edge without a business reason, directly conflicts with the requirement to reduce unnecessary intersite traffic for site-local workloads. Local egress can reduce latency and cross-site dependency if routing and policy permit it. The safer action is to design site-aware Tier-0/Edge egress so eligible traffic exits near its origin.
Incorrect Answers
A:That practice primarily harms the distinct federation recovery planning activity, in which the goal is to recover centralized policy management without erasing local state. Its failure mechanism is less direct for this specific edge locality across sites review. Here the key requirement is to reduce unnecessary intersite traffic for site-local workloads.
B:That practice primarily harms the distinct same-host east-west locality activity, in which the goal is to minimize unnecessary network transit while retaining routed segmentation. Its failure mechanism is less direct for this specific edge locality across sites review. Here the key requirement is to reduce unnecessary intersite traffic for site-local workloads.
D:That practice primarily harms the distinct change-window coordination activity, in which the goal is to preserve available connectivity during cross-instance maintenance. Its failure mechanism is less direct for this specific edge locality across sites review. Here the key requirement is to reduce unnecessary intersite traffic for site-local workloads.
Question 772
A reviewer must validate the intended NSX outcome. Situation: A network security rule for one subsidiary unexpectedly matches another tenant's VMs. Which result most directly demonstrates that the team can restrict the rule to the intended tenant resources?
- All affected nodes report synchronized clocks and new events sort correctly.
- An upstream table shows only the approved production prefixes from the gateway.
- The retired Project has no leftover scoped VPCs or rules; other Projects remain healthy.
- Only the target subsidiary's workloads match the corrected rule.
Explanation
Correct Answer
D:Only the target subsidiary's workloads match the corrected rule. This observation validates the specified tenant policy scoping outcome. Logical grouping must reflect the intended tenant boundary to prevent cross-tenant policy effects.
Incorrect Answers
A:This would validate ntp drift rather than the needed tenant policy scoping result. Time drift undermines log correlation and can affect certificate or authentication workflows. For the present case, the evidence must show that the team can restrict the rule to the intended tenant resources.
B:This would validate bgp prefix filtering rather than the needed tenant policy scoping result. Outbound routing policy prevents accidental advertisement of private or management networks. For the present case, the evidence must show that the team can restrict the rule to the intended tenant resources.
C:This would validate tenant lifecycle cleanup rather than the needed tenant policy scoping result. Tenant offboarding should clean scoped objects while leaving shared routing and provider services intact. For the present case, the evidence must show that the team can restrict the rule to the intended tenant resources.
Question 773
A reviewer must validate the intended NSX outcome. Situation: A compliance review asks how global policy can be restored after a major management outage. Which result most directly demonstrates that the team can recover the shared management intent with a tested procedure?
- A recovery test restores global objects and reestablishes healthy Local Manager synchronization.
- All affected nodes report synchronized clocks and new events sort correctly.
- Certificate validation succeeds and the enrolled location reaches healthy synchronization.
- After the zone correction, the segment becomes available in the intended host cluster.
Explanation
Correct Answer
A:A recovery test restores global objects and reestablishes healthy Local Manager synchronization. This observation validates the specified global backup recovery outcome. Recovery needs trustworthy backups of global policy and a procedure to restore management relationships.
Incorrect Answers
B:This would validate ntp drift rather than the needed global backup recovery result. Time drift undermines log correlation and can affect certificate or authentication workflows. For the present case, the evidence must show that the team can recover the shared management intent with a tested procedure.
C:This would validate federation certificate trust rather than the needed global backup recovery result. Federation management relationships depend on authenticated and correctly identified endpoints. For the present case, the evidence must show that the team can recover the shared management intent with a tested procedure.
D:This would validate transport zone eligibility rather than the needed global backup recovery result. Transport zone participation governs where segments can appear for workload attachment. For the present case, the evidence must show that the team can recover the shared management intent with a tested procedure.
Question 774
A change review examines the following situation: A Tier-1 segment can reach internal workloads but not a public destination; the logical upstream path is missing. Which practice would most directly undermine the requirement to restore northbound routing to the external connectivity tier?
- changing segment DHCP lease values instead of defining the necessary NAT policy
- replacing all segment IP ranges while ignoring the missing northbound route
- attempting BGP over an unconnected management-only interface
- ignoring appliance resource alerts until the Edge node stops responding
Explanation
Correct Answer
B:The anti-pattern, replacing all segment IP ranges while ignoring the missing northbound route, directly conflicts with the requirement to restore northbound routing to the external connectivity tier. A connected application gateway needs a valid route for destinations beyond its local networks. The safer action is to verify Tier-1 connectivity and default route toward the intended Tier-0.
Incorrect Answers
A:That practice primarily harms the distinct tier-1 nat policy activity, in which the goal is to translate eligible egress source addresses at the intended Tier-1 service boundary. Its failure mechanism is less direct for this specific default route check review. Here the key requirement is to restore northbound routing to the external connectivity tier.
C:That practice primarily harms the distinct edge uplink segment activity, in which the goal is to prepare the VLAN-backed Edge uplink network. Its failure mechanism is less direct for this specific default route check review. Here the key requirement is to restore northbound routing to the external connectivity tier.
D:That practice primarily harms the distinct edge health operations activity, in which the goal is to avoid service instability from exhausted Edge resources. Its failure mechanism is less direct for this specific default route check review. Here the key requirement is to restore northbound routing to the external connectivity tier.
Question 775
An architect proposes the following step: inspect Edge interface and fabric switch port errors and drop counters. The context is: Intermittent drops affect all flows traversing a particular Edge uplink. What is the strongest technical reason for that decision?
- Non-disruptive checks can localize a fault before restarting shared infrastructure or deleting policy.
- SNAT maps source addresses outbound, and the corresponding state restores the internal destination on replies.
- Interface-level counters can distinguish physical congestion or faults from logical policy denial.
- DFW can act at workload interfaces independently of a centralized gateway service hop.
Explanation
Correct Answer
C:Interface-level counters can distinguish physical congestion or faults from logical policy denial. This explains the proposed decision in the current interface counter evidence situation. The intended outcome is to determine whether the uplink interface is discarding packets, and verification would show: Error/drop counters increment on the affected uplink during reproducible traffic tests.
Incorrect Answers
A:This statement can describe a minimum-impact troubleshooting problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to reduce incident blast radius while gathering reliable evidence; here the relevant requirement is to determine whether the uplink interface is discarding packets.
B:This statement can describe a nat egress and return walk problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to explain the stateful source and return address transformations; here the relevant requirement is to determine whether the uplink interface is discarding packets.
D:This statement can describe a dfw evaluation point problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to place the distributed firewall decision correctly in the flow path; here the relevant requirement is to determine whether the uplink interface is discarding packets.
Question 776
A change review examines the following situation: A transport-node fault triggered an NSX alarm, but the monitoring team is unsure where to find its realization error. Which practice would most directly undermine the requirement to inspect NSX-native alarm and component status?
- sending every NSX event to an unmonitored shared mailbox
- creating global rules before connecting any compatible Local Manager
- troubleshooting BGP authentication while Tier-1 network advertisement is disabled
- examining only the application server's event viewer when NSX reports a fabric component fault
Explanation
Correct Answer
D:The anti-pattern, examining only the application server's event viewer when NSX reports a fabric component fault, directly conflicts with the requirement to inspect NSX-native alarm and component status. The NSX interface exposes object-specific deployment and transport-node health useful for root-cause triage. The safer action is to review the NSX Manager alarm and transport-node realization views.
Incorrect Answers
A:That practice primarily harms the distinct monitoring alert ownership activity, in which the goal is to make monitoring actionable by assigning response responsibility. Its failure mechanism is less direct for this specific nsx manager alarms review. Here the key requirement is to inspect NSX-native alarm and component status.
B:That practice primarily harms the distinct manager deployment order activity, in which the goal is to onboard the NSX site into a supported multi-location Federation. Its failure mechanism is less direct for this specific nsx manager alarms review. Here the key requirement is to inspect NSX-native alarm and component status.
C:That practice primarily harms the distinct tier-1 route advertisement activity, in which the goal is to expose the intended Tier-1 segment routes northbound. Its failure mechanism is less direct for this specific nsx manager alarms review. Here the key requirement is to inspect NSX-native alarm and component status.
Question 777
An architect proposes the following step: choose active-active Tier-0 HA and configure compatible ECMP peers. The context is: A design requires stateless high-volume transit across multiple Edge uplinks. What is the strongest technical reason for that decision?
- Active-active service routers can forward external routing traffic on multiple Edge nodes where supported.
- Every transport endpoint needs an address reachable over its intended underlay.
- A saved global object is not sufficient if the local site never realizes the policy.
- A neighbor state alone cannot prove guest routes, policy, NAT and return path are correct.
Explanation
Correct Answer
A:Active-active service routers can forward external routing traffic on multiple Edge nodes where supported. This explains the proposed decision in the current tier-0 ha mode choice situation. The intended outcome is to enable supported multi-path forwarding at the external routing tier, and verification would show: Independent flows use multiple healthy equal-cost paths and fail over when one is removed.
Incorrect Answers
B:This statement can describe a tep ip allocation problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to provide unique reachable tunnel endpoint addresses for transport hosts; here the relevant requirement is to enable supported multi-path forwarding at the external routing tier.
C:This statement can describe a global rule realization problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to realize intended global policy on every targeted Local Manager; here the relevant requirement is to enable supported multi-path forwarding at the external routing tier.
D:This statement can describe a tier-0 deployment smoke test problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to validate gateway service from workload source to physical destination; here the relevant requirement is to enable supported multi-path forwarding at the external routing tier.
Question 778
A reviewer must validate the intended NSX outcome. Situation: Two isolated tenants both request 10.20.0.0/16 but should never be routed together. Which result most directly demonstrates that the team can preserve tenant route-context isolation when address overlap is permitted?
- The route appears among permitted outbound networks and upstream route advertisement succeeds.
- Traffic stays isolated and any allowed external translation uses the intended tenant context.
- Upstream routing learns the intended workload subnet after both advertisement stages.
- The partner sees the allowlisted source IP and replies return to the original workload.
Explanation
Correct Answer
B:Traffic stays isolated and any allowed external translation uses the intended tenant context. This observation validates the specified overlapping tenant addressing outcome. Overlapping private IPs can coexist only when their routing contexts and interconnect policies avoid ambiguity.
Incorrect Answers
A:This would validate vpc external ip block policy rather than the needed overlapping tenant addressing result. Outbound advertisement filters can suppress routes not covered by an approved External IP Block. For the present case, the evidence must show that the team can preserve tenant route-context isolation when address overlap is permitted.
C:This would validate tier-1 route advertisement rather than the needed overlapping tenant addressing result. Routes must be advertised from the Tier-1 and exported from the Tier-0 to reach physical peers. For the present case, the evidence must show that the team can preserve tenant route-context isolation when address overlap is permitted.
D:This would validate source nat on egress rather than the needed overlapping tenant addressing result. SNAT rewrites matching outbound source addresses for a defined network path. For the present case, the evidence must show that the team can preserve tenant route-context isolation when address overlap is permitted.
Question 779
A change review examines the following situation: A configured Edge appliance exists, but a new Tier-0 has no service placement target. Which practice would most directly undermine the requirement to make supported Edge capacity available to gateway service routers?
- marking HA tested merely because both Edge VMs display a green power icon
- ignoring Manager compatibility because both consoles use the same login page
- leaving all Edge nodes outside any service cluster while expecting auto-placement
- assuming a green global policy status proves all sites have identical data-plane health
Explanation
Correct Answer
C:The anti-pattern, leaving all Edge nodes outside any service cluster while expecting auto-placement, directly conflicts with the requirement to make supported Edge capacity available to gateway service routers. Service routers use a selected Edge cluster for their centralized functions. The safer action is to add the prepared Edge nodes to an Edge cluster used for gateway allocation.
Incorrect Answers
A:That practice primarily harms the distinct edge operational readiness activity, in which the goal is to confirm Edge cluster readiness under real traffic and a member outage. Its failure mechanism is less direct for this specific edge cluster membership review. Here the key requirement is to make supported Edge capacity available to gateway service routers.
B:That practice primarily harms the distinct version preflight activity, in which the goal is to avoid unsupported Federation control-plane combinations. Its failure mechanism is less direct for this specific edge cluster membership review. Here the key requirement is to make supported Edge capacity available to gateway service routers.
D:That practice primarily harms the distinct multi-site comparison activity, in which the goal is to compare per-site transport health under a shared management policy. Its failure mechanism is less direct for this specific edge cluster membership review. Here the key requirement is to make supported Edge capacity available to gateway service routers.
Question 780
Traffic has grown beyond existing Edge capacity, but new Edge nodes are not registered with NSX. The engineering team needs to scale service resources through the supported Edge preparation workflow. What action best addresses the immediate requirement?
- create a VLAN-backed NSX segment with the proper VLAN ID and switch uplink
- assign the gateway to a suitable Edge cluster and validate its service router
- review the gateway HA mode and service-router placement across the cluster
- deploy and prepare the additional Edge nodes, then extend the applicable service cluster
Explanation
Correct Answer
D:Extra Edge VMs contribute only after successful transport preparation and service placement. The selected action, deploy and prepare the additional Edge nodes, then extend the applicable service cluster, directly supports the specified goal to scale service resources through the supported Edge preparation workflow. A useful confirmation is: The cluster contains healthy new Edge members and gateway headroom improves.
Incorrect Answers
A:Create a VLAN-backed NSX segment with the proper VLAN ID and switch uplink would address the separate case of vlan segment creation, where the objective is to extend the designated physical L2 network to the virtual interface. VLAN-backed segments use physical tagged forwarding for integration with non-overlay devices. Here the requirement is instead to scale service resources through the supported Edge preparation workflow; that step does not directly satisfy it.
B:Assign the gateway to a suitable Edge cluster and validate its service router would address the separate case of service router allocation, where the objective is to make a service-capable Tier-1 instance operational. Centralized gateway services depend on eligible Edge nodes rather than distributed routing alone. Here the requirement is instead to scale service resources through the supported Edge preparation workflow; that step does not directly satisfy it.
C:Review the gateway HA mode and service-router placement across the cluster would address the separate case of edge ha service placement, where the objective is to enforce the expected gateway HA placement on eligible Edge nodes. Correct placement requires sufficient eligible Edge nodes and an appropriate HA configuration. Here the requirement is instead to scale service resources through the supported Edge preparation workflow; that step does not directly satisfy it.