VMware 3V0-25.25 Practice Test 14
Question 130
A change review examines the following situation: Two VMs share an overlay segment but reside on different ESXi hosts. Which practice would most directly undermine the requirement to identify transport encapsulation between hosts for Layer-2 delivery?
- assessing only same-segment Layer-2 switching for traffic between independent Tier-1 networks
- assuming physical leaf switches forward the raw tenant MAC frame without encapsulation
- using only an individual VM performance chart as an end-to-end network map
- rewriting firewall policy before looking at the dropping interface counters
Explanation
Correct Answer
B:The anti-pattern, assuming physical leaf switches forward the raw tenant MAC frame without encapsulation, directly conflicts with the requirement to identify transport encapsulation between hosts for Layer-2 delivery. The underlay forwards TEP packets while the overlay carries the tenant frame across hosts. The safer action is to trace source vNIC, source TEP GENEVE encapsulation, underlay, destination TEP and vNIC.
Incorrect Answers
A:That practice primarily harms the distinct two tier-1 gateways through tier-0 activity, in which the goal is to describe the route boundary between independent application gateway contexts. Its failure mechanism is less direct for this specific cross-host same-segment packet walk review. Here the key requirement is to identify transport encapsulation between hosts for Layer-2 delivery.
C:That practice primarily harms the distinct vcf operations for networks path activity, in which the goal is to correlate virtual and physical network dependencies for the application. Its failure mechanism is less direct for this specific cross-host same-segment packet walk review. Here the key requirement is to identify transport encapsulation between hosts for Layer-2 delivery.
D:That practice primarily harms the distinct interface counter evidence activity, in which the goal is to determine whether the uplink interface is discarding packets. Its failure mechanism is less direct for this specific cross-host same-segment packet walk review. Here the key requirement is to identify transport encapsulation between hosts for Layer-2 delivery.
Question 131
An architect proposes the following step: include the service-enabled Tier-1 SR on Edge in the translation path. The context is: A Tier-1 hosts a centralized SNAT service even though ordinary east-west routes are distributed. What is the strongest technical reason for that decision?
- BGP state and prefix advertisements expose session or policy faults not visible in an ICMP test.
- A duplicate transport endpoint IP causes ambiguous underlay neighbor or routing behavior.
- Centralized stateful gateway services require service-router processing beyond host distributed forwarding.
- DFW can act at workload interfaces independently of a centralized gateway service hop.
Explanation
Correct Answer
C:Centralized stateful gateway services require service-router processing beyond host distributed forwarding. This explains the proposed decision in the current tier-1 service-router transit situation. The intended outcome is to explain why this north-south flow must reach an Edge service router, and verification would show: The trace visits the Tier-1 SR where NAT occurs and then continues toward the Tier-0.
Incorrect Answers
A:This statement can describe a bgp diagnostic view problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to inspect the control-plane state and routes of the external peer; here the relevant requirement is to explain why this north-south flow must reach an Edge service router.
B:This statement can describe a tep address collision problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to restore unique tunnel endpoint identity across the fabric; here the relevant requirement is to explain why this north-south flow must reach an Edge service router.
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 explain why this north-south flow must reach an Edge service router.
Question 132
A compliance review asks how global policy can be restored after a major management outage. The engineering team needs to recover the shared management intent with a tested procedure. What action best addresses the immediate requirement?
- create a VLAN-backed NSX segment with the proper VLAN ID and switch uplink
- validate permitted firewall ports, stable routing and direct supported manager path
- test each intended Tier-1 function against its declared scope and gateway path
- schedule Global Manager backups and rehearse supported restoration
Explanation
Correct Answer
D:Recovery needs trustworthy backups of global policy and a procedure to restore management relationships. The selected action, schedule Global Manager backups and rehearse supported restoration, directly supports the specified goal to recover the shared management intent with a tested procedure. A useful confirmation is: A recovery test restores global objects and reestablishes healthy Local Manager synchronization.
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 recover the shared management intent with a tested procedure; that step does not directly satisfy it.
B:Validate permitted firewall ports, stable routing and direct supported manager path would address the separate case of federation control-path reachability, where the objective is to ensure reliable Global-to-Local Manager control communication. Control-plane enrollment needs working transport and authentication, not just name resolution. Here the requirement is instead to recover the shared management intent with a tested procedure; that step does not directly satisfy it.
C:Test each intended Tier-1 function against its declared scope and gateway path would address the separate case of tier-1 gateway smoke test, where the objective is to validate routing, DHCP, DNS and NAT as separate configured capabilities. Creating one logical router does not automatically configure every optional service on it. Here the requirement is instead to recover the shared management intent with a tested procedure; that step does not directly satisfy it.
Question 133
One Local Manager trails the Global Manager by an incompatible version and global policy realization becomes unreliable. The engineering team needs to align the software versions required for supported Federation operations. What action best addresses the immediate requirement?
- upgrade or reconcile the Local Manager to the documented compatible build
- keep the eligible east-west path on distributed logical routing
- track Edge CPU, throughput and service capacity per instance before expansion
- plan the stretched segment with required intersite tunnel and transport readiness
Explanation
Correct Answer
A:Version compatibility matters because Federation control objects and realization depend on supported Manager combinations. The selected action, upgrade or reconcile the Local Manager to the documented compatible build, directly supports the specified goal to align the software versions required for supported Federation operations. A useful confirmation is: The Federation health view reports compatible versions and global objects realize successfully.
Incorrect Answers
B:Keep the eligible east-west path on distributed logical routing would address the separate case of same-host east-west locality, where the objective is to minimize unnecessary network transit while retaining routed segmentation. Distributed routing localizes many inter-segment flows on transport hosts, avoiding a centralized Edge hop. Here the requirement is instead to align the software versions required for supported Federation operations; that step does not directly satisfy it.
C: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 align the software versions required for supported Federation operations; that step does not directly satisfy it.
D:Plan the stretched segment with required intersite tunnel and transport readiness would address the separate case of stretched network eligibility, where the objective is to extend an eligible overlay segment between supported Federation locations. A stretched logical network depends on supported Federation design and working cross-site transport connectivity. Here the requirement is instead to align the software versions required for supported Federation operations; that step does not directly satisfy it.
Question 134
An architect proposes the following step: coordinate trunk VLAN admission with the switch team. The context is: An NSX VLAN segment exists, but the leaf switch does not permit its VLAN on the uplink trunk. What is the strongest technical reason for that decision?
- Declared and actual NSX transport configuration should agree after changes.
- A VLAN-backed NSX network depends on the underlying tagged L2 connectivity.
- Transport zone participation governs where segments can appear for workload attachment.
- NSX VPC enables scoped self-service networking with provider-defined connectivity and constraints.
Explanation
Correct Answer
B:A VLAN-backed NSX network depends on the underlying tagged L2 connectivity. This explains the proposed decision in the current physical vlan availability situation. The intended outcome is to make the physical fabric carry the VLAN used by the NSX segment, and verification would show: The physical switch sees frames with the intended VLAN and target hosts receive them.
Incorrect Answers
A:This statement can describe a config consistency audit problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to restore policy consistency without changing unrelated transport nodes; here the relevant requirement is to make the physical fabric carry the VLAN used by the NSX segment.
C: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 make the physical fabric carry the VLAN used by the NSX segment.
D:This statement can describe a project-scoped vpc creation problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to provide delegated workload networking within defined tenant limits; here the relevant requirement is to make the physical fabric carry the VLAN used by the NSX segment.
Question 135
Two upstream peers advertise the same destination, but flows exit the wrong NSX uplink. The engineering team needs to align preferred external route selection with enterprise routing design. What action best addresses the immediate requirement?
- align the NSX VLAN segment tag with the physical trunk allowed VLANs
- start with scoped health, logs and Traceflow before invasive changes
- review BGP attributes, route-map policies and observed best-path decisions
- walk segment to Tier-1 distributed routing, required service-router hops, Tier-0 external interface and fabric
Explanation
Correct Answer
C:BGP path selection depends on configured policy and attributes, not simply the presence of two neighbors. The selected action, review BGP attributes, route-map policies and observed best-path decisions, directly supports the specified goal to align preferred external route selection with enterprise routing design. A useful confirmation is: The chosen next hop and path attributes match the intended external egress policy.
Incorrect Answers
A:Align the NSX VLAN segment tag with the physical trunk allowed VLANs would address the separate case of fabric vlan mismatch, where the objective is to restore Layer-2 adjacency on the correct external uplink VLAN. A VLAN mismatch prevents local neighbor discovery before routing protocols can operate. Here the requirement is instead to align preferred external route selection with enterprise routing design; that step does not directly satisfy it.
B:Start with scoped health, logs and Traceflow before invasive changes would address the separate case of minimum-impact troubleshooting, where the objective is to reduce incident blast radius while gathering reliable evidence. Non-disruptive checks can localize a fault before restarting shared infrastructure or deleting policy. Here the requirement is instead to align preferred external route selection with enterprise routing design; that step does not directly satisfy it.
D:Walk segment to Tier-1 distributed routing, required service-router hops, Tier-0 external interface and fabric would address the separate case of north-south packet walk, where the objective is to describe the sequence from tenant segment to physical network. North-south paths cross the logical routing tiers and any centralized services before leaving via a physical uplink. Here the requirement is instead to align preferred external route selection with enterprise routing design; that step does not directly satisfy it.
Question 136
A reviewer must validate the intended NSX outcome. Situation: Two overlay workloads communicate on the same ESXi host but a security rule blocks the session. Which result most directly demonstrates that the team can place the distributed firewall decision correctly in the flow path?
- The trace identifies the participating logical components and a specific drop or forwarding hop.
- Captures show the translated address outside and the correct original workload destination inside.
- Log entries show event times and component identities correlated with the reported impact.
- Rule telemetry shows the matched source/destination policy at the relevant VM forwarding point.
Explanation
Correct Answer
D:Rule telemetry shows the matched source/destination policy at the relevant VM forwarding point. This observation validates the specified dfw evaluation point outcome. DFW can act at workload interfaces independently of a centralized gateway service hop.
Incorrect Answers
A:This would validate traceflow path rather than the needed dfw evaluation point result. Traceflow can expose logical path decisions and drops across the distributed and service-routing path. For the present case, the evidence must show that the team can place the distributed firewall decision correctly in the flow path.
B:This would validate nat egress and return walk rather than the needed dfw evaluation point result. SNAT maps source addresses outbound, and the corresponding state restores the internal destination on replies. For the present case, the evidence must show that the team can place the distributed firewall decision correctly in the flow path.
C:This would validate central log correlation rather than the needed dfw evaluation point result. Retained logs allow investigators to sequence transient faults after live status has recovered. For the present case, the evidence must show that the team can place the distributed firewall decision correctly in the flow path.
Question 137
A change review examines the following situation: Different departments need independent subnets while sharing a common physical leaf-spine fabric. Which practice would most directly undermine the requirement to separate tenant logical networks from physical trunk proliferation?
- sharing a flat unfiltered tenant VLAN solely because the same leaf switches are used
- hand-configuring inconsistent uplink and transport VLAN settings on every host
- relying only on a single local site snapshot as a complete Global Manager recovery plan
- performing NAT solely on an overlay transport zone object
Explanation
Correct Answer
A:The anti-pattern, sharing a flat unfiltered tenant VLAN solely because the same leaf switches are used, directly conflicts with the requirement to separate tenant logical networks from physical trunk proliferation. Logical segments and gateway policies isolate traffic without requiring one physical VLAN per tenant subnet across the fabric. The safer action is to create isolated NSX overlay segments and controlled routing boundaries.
Incorrect Answers
B:That practice primarily harms the distinct uplink profiles activity, in which the goal is to apply repeatable physical-uplink mapping during NSX preparation. Its failure mechanism is less direct for this specific tenant segmentation at scale review. Here the key requirement is to separate tenant logical networks from physical trunk proliferation.
C: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 tenant segmentation at scale review. Here the key requirement is to separate tenant logical networks from physical trunk proliferation.
D:That practice primarily harms the distinct centralized nat locality activity, in which the goal is to place translation where north-south packets traverse a stateful service. Its failure mechanism is less direct for this specific tenant segmentation at scale review. Here the key requirement is to separate tenant logical networks from physical trunk proliferation.
Question 138
A reviewer must validate the intended NSX outcome. Situation: A platform team plans networking component upgrades across multiple VCF instances. Which result most directly demonstrates that the team can avoid breaking supported component interoperability during maintenance?
- Host uplink statistics show intended link utilization and path resilience.
- Prechecks and postchecks show each instance remains within a supported component version set.
- The same class of permitted or blocked traffic is observed under the policy in both sites.
- An inventory search can uniquely identify a segment by site, instance, and owner.
Explanation
Correct Answer
B:Prechecks and postchecks show each instance remains within a supported component version set. This observation validates the specified fleet lifecycle sequencing outcome. Supported lifecycle ordering and interop matrices reduce control-plane and host-version conflicts.
Incorrect Answers
A:This would validate uplink path diversity rather than the needed fleet lifecycle sequencing result. Teaming and path configuration determine which physical links can carry transport traffic. For the present case, the evidence must show that the team can avoid breaking supported component interoperability during maintenance.
C:This would validate global security objects rather than the needed fleet lifecycle sequencing result. Global groups can match protected resources across sites while a central policy expresses common decisions. For the present case, the evidence must show that the team can avoid breaking supported component interoperability during maintenance.
D:This would validate shared naming conventions rather than the needed fleet lifecycle sequencing result. Unique naming and ownership metadata help distinguish otherwise similar segments or gateways. For the present case, the evidence must show that the team can avoid breaking supported component interoperability during maintenance.
Question 139
An Edge VM is deployed but NSX reports that it cannot host gateway services. The engineering team needs to complete the NSX transport-node realization of the Edge. What action best addresses the immediate requirement?
- assign the application's Project role and publish suitable VPC connectivity settings
- validate local and remote tunnel endpoint networking before enabling the stretched segment
- configure the Edge transport node with required zones, TEPs and uplinks
- create a VLAN transport-zone segment with the intended VLAN ID and uplink reachability
Explanation
Correct Answer
C:An Edge appliance must be prepared as a transport node before it can provide intended gateway data-plane services. The selected action, configure the Edge transport node with required zones, TEPs and uplinks, directly supports the specified goal to complete the NSX transport-node realization of the Edge. A useful confirmation is: The Edge transport node becomes healthy and eligible for the configured Edge cluster.
Incorrect Answers
A:Assign the application's Project role and publish suitable VPC connectivity settings would address the separate case of onboarding delegation, where the objective is to expose only approved self-service network capabilities. Delegation works when rights and available network resources are scoped together. Here the requirement is instead to complete the NSX transport-node realization of the Edge; that step does not directly satisfy it.
B:Validate local and remote tunnel endpoint networking before enabling the stretched segment would address the separate case of stretched segment preparation, where the objective is to prepare the data-plane prerequisites of a stretched overlay network. Stretched data-plane communication depends on working local and remote overlay transport across sites. Here the requirement is instead to complete the NSX transport-node realization of the Edge; that step does not directly satisfy it.
D:Create a VLAN transport-zone segment with the intended VLAN ID and uplink reachability would address the separate case of vlan transport zone, where the objective is to expose the proper physical VLAN through NSX transport configuration. VLAN-backed segments bridge logical interfaces to matching physical Layer-2 network identifiers. Here the requirement is instead to complete the NSX transport-node realization of the Edge; that step does not directly satisfy it.
Question 140
A change review examines the following situation: A platform team plans networking component upgrades across multiple VCF instances. Which practice would most directly undermine the requirement to avoid breaking supported component interoperability during maintenance?
- reusing a Manager VIP address in another routable instance without checking address overlap
- investigating only application DNS while remote tunnel endpoints remain unreachable
- sharing a flat unfiltered tenant VLAN solely because the same leaf switches are used
- upgrading all NSX Managers independently without considering VCF lifecycle compatibility
Explanation
Correct Answer
D:The anti-pattern, upgrading all NSX Managers independently without considering VCF lifecycle compatibility, directly conflicts with the requirement to avoid breaking supported component interoperability during maintenance. Supported lifecycle ordering and interop matrices reduce control-plane and host-version conflicts. The safer action is to sequence updates according to VCF and NSX compatibility and lifecycle guidance.
Incorrect Answers
A:That practice primarily harms the distinct management address governance activity, in which the goal is to preserve unique routable management addressing for each VCF instance. Its failure mechanism is less direct for this specific fleet lifecycle sequencing review. Here the key requirement is to avoid breaking supported component interoperability during maintenance.
B:That practice primarily harms the distinct remote tunnel reachability activity, in which the goal is to restore intersite overlay transport between Federation locations. Its failure mechanism is less direct for this specific fleet lifecycle sequencing review. Here the key requirement is to avoid breaking supported component interoperability during maintenance.
C:That practice primarily harms the distinct tenant segmentation at scale activity, in which the goal is to separate tenant logical networks from physical trunk proliferation. Its failure mechanism is less direct for this specific fleet lifecycle sequencing review. Here the key requirement is to avoid breaking supported component interoperability during maintenance.