VMware 3V0-25.25 Practice Test 87
Question 860
An architect proposes the following step: configure the Edge transport node with required zones, TEPs and uplinks. The context is: An Edge VM is deployed but NSX reports that it cannot host gateway services. What is the strongest technical reason for that decision?
- Site-specific monitoring distinguishes local transport faults from global policy defects.
- Every transport endpoint needs an address reachable over its intended underlay.
- The Tier-1 uses northbound connectivity through Tier-0 for external access.
- An Edge appliance must be prepared as a transport node before it can provide intended gateway data-plane services.
Explanation
Correct Answer
D:An Edge appliance must be prepared as a transport node before it can provide intended gateway data-plane services. This explains the proposed decision in the current edge transport preparation situation. The intended outcome is to complete the NSX transport-node realization of the Edge, and verification would show: The Edge transport node becomes healthy and eligible for the configured Edge cluster.
Incorrect Answers
A:This statement can describe a multi-site comparison problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to compare per-site transport health under a shared management policy; here the relevant requirement is to complete the NSX transport-node realization of the Edge.
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 complete the NSX transport-node realization of the Edge.
C:This statement can describe a tier-1 link to tier-0 problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to connect application-facing logical routing to the enterprise external tier; here the relevant requirement is to complete the NSX transport-node realization of the Edge.
Question 861
A shared workload segment is planned for two sites but the remote tunnel transport is absent. The engineering team needs to prepare the data-plane prerequisites of a stretched overlay network. What action best addresses the immediate requirement?
- validate local and remote tunnel endpoint networking before enabling the stretched segment
- route alert definitions to an accountable owner and a documented escalation policy
- configure supported Transit Gateway static route redistribution on Tier-0 as required
- deploy a supported highly available Global Manager cluster
Explanation
Correct Answer
A:Stretched data-plane communication depends on working local and remote overlay transport across sites. The selected action, validate local and remote tunnel endpoint networking before enabling the stretched segment, directly supports the specified goal to prepare the data-plane prerequisites of a stretched overlay network. A useful confirmation is: Test VMs on the stretched segment exchange traffic through working remote TEP paths.
Incorrect Answers
B:Route alert definitions to an accountable owner and a documented escalation policy would address the separate case of monitoring alert ownership, where the objective is to make monitoring actionable by assigning response responsibility. Alert effectiveness depends on response workflow as well as the metric threshold. Here the requirement is instead to prepare the data-plane prerequisites of a stretched overlay network; that step does not directly satisfy it.
C:Configure supported Transit Gateway static route redistribution on Tier-0 as required would address the separate case of public subnet external reachability, where the objective is to advertise the public VPC network through the centralized external path. VPC Transit Gateway routes are not automatically included in every Tier-0 external protocol advertisement. Here the requirement is instead to prepare the data-plane prerequisites of a stretched overlay network; that step does not directly satisfy it.
D:Deploy a supported highly available Global Manager cluster would address the separate case of global manager availability, where the objective is to keep centralized policy management available during a single appliance outage. Multiple eligible Manager nodes provide management service availability beyond one VM. Here the requirement is instead to prepare the data-plane prerequisites of a stretched overlay network; that step does not directly satisfy it.
Question 862
An architect proposes the following step: replace affected credentials in a controlled rotation and update dependent services. The context is: A shared administration password used by network automation may have been exposed. What is the strongest technical reason for that decision?
- Transport zone participation governs where segments can appear for workload attachment.
- Credential handling must address exposure without leaving broken or unknown access paths.
- Drift review keeps current operational settings aligned with documented architecture.
- An Edge appliance must be prepared as a transport node before it can provide intended gateway data-plane services.
Explanation
Correct Answer
B:Credential handling must address exposure without leaving broken or unknown access paths. This explains the proposed decision in the current credential rotation situation. The intended outcome is to rotate secrets while preserving authorized NSX integrations, and verification would show: Old credentials are rejected and authorized integrations authenticate with new stored secrets.
Incorrect Answers
A:This statement can describe a transport zone eligibility problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to make the segment realizable where workloads are placed; here the relevant requirement is to rotate secrets while preserving authorized NSX integrations.
C:This statement can describe a operational drift reconciliation problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to identify approved exceptions and correct unintended drift; here the relevant requirement is to rotate secrets while preserving authorized NSX integrations.
D: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 rotate secrets while preserving authorized NSX integrations.
Question 863
A reviewer must validate the intended NSX outcome. Situation: A Tier-0 gateway can ping its leaf neighbor, but the peer is not exchanging production subnet routes. Which result most directly demonstrates that the team can inspect the control-plane state and routes of the external peer?
- The flow matches a specific deny rule; a scoped correction restores only authorized access.
- The trace visits the Tier-1 SR where NAT occurs and then continues toward the Tier-0.
- The diagnosis identifies whether adjacency is established and which expected prefixes are missing.
- Matched ingress and egress captures show where address or encapsulation headers change.
Explanation
Correct Answer
C:The diagnosis identifies whether adjacency is established and which expected prefixes are missing. This observation validates the specified bgp diagnostic view outcome. BGP state and prefix advertisements expose session or policy faults not visible in an ICMP test.
Incorrect Answers
A:This would validate distributed firewall denial rather than the needed bgp diagnostic view result. Gateway reachability does not prove that the application flow is allowed by host-enforced policy. For the present case, the evidence must show that the team can inspect the control-plane state and routes of the external peer.
B:This would validate tier-1 service-router transit rather than the needed bgp diagnostic view result. Centralized stateful gateway services require service-router processing beyond host distributed forwarding. For the present case, the evidence must show that the team can inspect the control-plane state and routes of the external peer.
D:This would validate packet capture evidence rather than the needed bgp diagnostic view result. A packet capture reveals emitted packets, translated fields and return traffic directly. For the present case, the evidence must show that the team can inspect the control-plane state and routes of the external peer.
Question 864
A reviewer must validate the intended NSX outcome. Situation: An HA Edge cluster has both nodes hosted on the same ESXi server. Which result most directly demonstrates that the team can protect gateway forwarding from a single host loss?
- The intended prefixes appear in the Tier-0 advertised route list and peer routing table.
- After one Edge failure, service connectivity recovers according to the supported HA design.
- The cluster contains healthy new Edge members and gateway headroom improves.
- A single-host outage leaves a healthy forwarding Edge in service.
Explanation
Correct Answer
D:A single-host outage leaves a healthy forwarding Edge in service. This observation validates the specified edge failure-domain placement outcome. A redundant virtual cluster cannot survive a common physical host failure if every member shares that host.
Incorrect Answers
A:This would validate route redistribution sources rather than the needed edge failure-domain placement result. BGP adjacency alone does not guarantee that all relevant NSX network prefixes are exported. For the present case, the evidence must show that the team can protect gateway forwarding from a single host loss.
B:This would validate service-router fault tolerance rather than the needed edge failure-domain placement result. Stateful service availability requires healthy centralized service placement and a verified recovery path. For the present case, the evidence must show that the team can protect gateway forwarding from a single host loss.
C:This would validate edge scaling lifecycle rather than the needed edge failure-domain placement result. Extra Edge VMs contribute only after successful transport preparation and service placement. For the present case, the evidence must show that the team can protect gateway forwarding from a single host loss.
Question 865
An architect proposes the following step: create a VLAN-backed NSX segment with the proper VLAN ID and switch uplink. The context is: A physical firewall interface and an NSX-attached virtual appliance must share one existing VLAN. What is the strongest technical reason for that decision?
- VLAN-backed segments use physical tagged forwarding for integration with non-overlay devices.
- DHCP clients require a valid service or relay path and usable address scope.
- Gateway throughput and session capacity depend on the resources available to Edge nodes.
- Provisioning status is only a prerequisite; production readiness requires packet-flow validation.
Explanation
Correct Answer
A:VLAN-backed segments use physical tagged forwarding for integration with non-overlay devices. This explains the proposed decision in the current vlan segment creation situation. The intended outcome is to extend the designated physical L2 network to the virtual interface, and verification would show: The firewall and VM exchange ARP/neighbor traffic on the agreed VLAN.
Incorrect Answers
B:This statement can describe a dhcp scope association problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to make the correct DHCP function available to segment members; here the relevant requirement is to extend the designated physical L2 network to the virtual interface.
C:This statement can describe a edge capacity selection problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to size Edge service nodes for expected stateful networking demand; here the relevant requirement is to extend the designated physical L2 network to the virtual interface.
D:This statement can describe a edge operational readiness problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to confirm Edge cluster readiness under real traffic and a member outage; here the relevant requirement is to extend the designated physical L2 network to the virtual interface.
Question 866
An architect proposes the following step: perform a documented supported NSX restore rehearsal on an appropriate test target. The context is: A team reports successful backup jobs but has never tested a restore of NSX configuration. What is the strongest technical reason for that decision?
- Avi can supply application load-balancing capabilities integrated with VMware networking design.
- Only a recovery test establishes that stored backups and required keys/credentials are sufficient.
- Gateway firewall policy alone cannot inspect a flow that never reaches the external service boundary.
- Reliable backups protect management and policy configuration when an upgrade or outage requires restoration.
Explanation
Correct Answer
B:Only a recovery test establishes that stored backups and required keys/credentials are sufficient. This explains the proposed decision in the current restore rehearsal situation. The intended outcome is to prove management recovery before an actual outage, and verification would show: The restored manager configuration and representative policy objects match expected results.
Incorrect Answers
A:This statement can describe a load balancing integration problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to provide a supported VCF application load-balancing integration; here the relevant requirement is to prove management recovery before an actual outage.
C:This statement can describe a distributed versus gateway firewall problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to apply security where that east-west flow actually travels; here the relevant requirement is to prove management recovery before an actual outage.
D:This statement can describe a manager backup schedule problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to preserve a supported recovery point for the management configuration; here the relevant requirement is to prove management recovery before an actual outage.
Question 867
Two virtual machines on the same logical overlay segment run on separate ESXi hosts connected through routed physical switches. The engineering team needs to connect logical segment members across different physical hosts. What action best addresses the immediate requirement?
- prepare the cluster as NSX transport nodes with compatible switching and transport-zone assignment
- design an IP-routed underlay with TEP reachability and overlay segment membership
- use NSX overlay transport nodes and reachable tunnel endpoint addresses to carry GENEVE traffic
- measure before-and-after path latency, packet loss and Edge utilization
Explanation
Correct Answer
C:GENEVE encapsulates overlay frames between transport-node TEPs so the underlay need not learn each tenant MAC address. The selected action, use NSX overlay transport nodes and reachable tunnel endpoint addresses to carry GENEVE traffic, directly supports the specified goal to connect logical segment members across different physical hosts. A useful confirmation is: Captures on underlay-facing uplinks show tunnel traffic between the transport-node endpoint addresses.
Incorrect Answers
A:Prepare the cluster as NSX transport nodes with compatible switching and transport-zone assignment would address the separate case of transport node eligibility, where the objective is to turn ordinary hypervisor hosts into participating NSX data-plane nodes. Being managed by vCenter does not by itself create NSX transport-node participation. Here the requirement is instead to connect logical segment members across different physical hosts; that step does not directly satisfy it.
B:Design an IP-routed underlay with TEP reachability and overlay segment membership would address the separate case of overlay fabric reachability, where the objective is to support L2 semantics without extending a large physical VLAN everywhere. Overlay encapsulation carries L2 traffic across the IP underlay, separating tenant switching from fabric VLAN sprawl. Here the requirement is instead to connect logical segment members across different physical hosts; that step does not directly satisfy it.
D:Measure before-and-after path latency, packet loss and Edge utilization would address the separate case of latency baseline, where the objective is to identify whether networking datapath is the actual bottleneck. A comparable baseline distinguishes network forwarding delay from application processing or storage latency. Here the requirement is instead to connect logical segment members across different physical hosts; that step does not directly satisfy it.
Question 868
A change review examines the following situation: A consultant created a segment and wants to confirm both L2 connectivity and intended routed isolation. Which practice would most directly undermine the requirement to test the correct Layer-2 membership and Layer-3 policy outcomes?
- treating the object creation response as proof that all transport nodes applied it
- editing a local gateway as though it were a shared global egress template
- redistributing both identical tenant prefixes into one shared fabric table
- using a same-subnet ping as proof that inter-subnet routing and security are correct
Explanation
Correct Answer
D:The anti-pattern, using a same-subnet ping as proof that inter-subnet routing and security are correct, directly conflicts with the requirement to test the correct Layer-2 membership and Layer-3 policy outcomes. Segment readiness must check its L2 data path separately from routed access controls. The safer action is to run same-segment and cross-segment tests against the declared gateway/security design.
Incorrect Answers
A:That practice primarily harms the distinct segment realization drift activity, in which the goal is to restore the data-plane realization of an already defined network. Its failure mechanism is less direct for this specific segmentation validation review. Here the key requirement is to test the correct Layer-2 membership and Layer-3 policy outcomes.
B:That practice primarily harms the distinct federation location governance activity, in which the goal is to keep the scope of networking objects explicit during Federation rollout. Its failure mechanism is less direct for this specific segmentation validation review. Here the key requirement is to test the correct Layer-2 membership and Layer-3 policy outcomes.
C:That practice primarily harms the distinct address conflict isolation activity, in which the goal is to preserve independent tenant routing contexts and explicit interconnection policy. Its failure mechanism is less direct for this specific segmentation validation review. Here the key requirement is to test the correct Layer-2 membership and Layer-3 policy outcomes.
Question 869
A change review examines the following situation: VMs behind separate Tier-1 gateways need authorized routing through a shared Tier-0 hierarchy. Which practice would most directly undermine the requirement to describe the route boundary between independent application gateway contexts?
- assessing only same-segment Layer-2 switching for traffic between independent Tier-1 networks
- rebooting the leaf switch when host-level policy is clearly dropping packets
- assuming Tier-1 distributed routing alone performs every stateful gateway service
- relying only on a management dashboard color without inspecting the disputed packet
Explanation
Correct Answer
A:The anti-pattern, assessing only same-segment Layer-2 switching for traffic between independent Tier-1 networks, directly conflicts with the requirement to describe the route boundary between independent application gateway contexts. The Tier-0 hierarchy provides an interconnection path when distinct Tier-1 domains exchange permitted routes. The safer action is to walk the source Tier-1, the shared Tier-0 routing tier and the destination Tier-1 as configured.
Incorrect Answers
B:That practice primarily harms the distinct distributed firewall rule diagnostics activity, in which the goal is to identify the security rule that blocks the workload flow. Its failure mechanism is less direct for this specific two tier-1 gateways through tier-0 review. Here the key requirement is to describe the route boundary between independent application gateway contexts.
C:That practice primarily harms the distinct tier-1 service-router transit activity, in which the goal is to explain why this north-south flow must reach an Edge service router. Its failure mechanism is less direct for this specific two tier-1 gateways through tier-0 review. Here the key requirement is to describe the route boundary between independent application gateway contexts.
D:That practice primarily harms the distinct packet capture evidence activity, in which the goal is to observe actual dataplane packet headers at the relevant boundaries. Its failure mechanism is less direct for this specific two tier-1 gateways through tier-0 review. Here the key requirement is to describe the route boundary between independent application gateway contexts.
Question 870
A change review examines the following situation: A network security rule for one subsidiary unexpectedly matches another tenant's VMs. Which practice would most directly undermine the requirement to restrict the rule to the intended tenant resources?
- using Manager enrollment success as a substitute for real traffic failover testing
- writing all tenant firewall rules against an unfiltered global VM inventory
- placing both overlapping networks into one unsegmented shared routing table
- giving the application team broad access to all Edge clusters as a shortcut
Explanation
Correct Answer
B:The anti-pattern, writing all tenant firewall rules against an unfiltered global VM inventory, directly conflicts with the requirement to restrict the rule to the intended tenant resources. Logical grouping must reflect the intended tenant boundary to prevent cross-tenant policy effects. The safer action is to refine Project/group scope and workload membership in the policy.
Incorrect Answers
A:That practice primarily harms the distinct remote-site failover test activity, in which the goal is to verify that the new site's network behaves under a planned failure. Its failure mechanism is less direct for this specific tenant policy scoping review. Here the key requirement is to restrict the rule to the intended tenant resources.
C:That practice primarily harms the distinct overlapping tenant addressing activity, in which the goal is to preserve tenant route-context isolation when address overlap is permitted. Its failure mechanism is less direct for this specific tenant policy scoping review. Here the key requirement is to restrict the rule to the intended tenant resources.
D:That practice primarily harms the distinct onboarding delegation activity, in which the goal is to expose only approved self-service network capabilities. Its failure mechanism is less direct for this specific tenant policy scoping review. Here the key requirement is to restrict the rule to the intended tenant resources.