VMware 3V0-25.25 Practice Test 90
Question 890
VM A and VM B are in different NSX segments linked to the same Tier-1 on one host. The engineering team needs to locate distributed inter-subnet routing in the packet walk. What action best addresses the immediate requirement?
- inspect equal-cost best-path attributes and routing policy before claiming ECMP
- trace the source segment through host Tier-1 distributed routing and destination segment
- trace the VM vNICs through local NSX logical switching and relevant host security checks
- correct the Edge TEP transport VLAN and endpoint reachability
Explanation
Correct Answer
B:Eligible east-west logical routing is performed by the distributed dataplane instead of requiring an Edge hop. The selected action, trace the source segment through host Tier-1 distributed routing and destination segment, directly supports the specified goal to locate distributed inter-subnet routing in the packet walk. A useful confirmation is: Traceflow shows Tier-1 distributed routing on the host with the appropriate firewall decisions.
Incorrect Answers
A:Inspect equal-cost best-path attributes and routing policy before claiming ECMP would address the separate case of ecmp path eligibility, where the objective is to understand why traffic is not load shared across the new peer. Only eligible equal-cost next hops enter the relevant ECMP forwarding set under the chosen routing rules. Here the requirement is instead to locate distributed inter-subnet routing in the packet walk; that step does not directly satisfy it.
C:Trace the VM vNICs through local NSX logical switching and relevant host security checks would address the separate case of same-host same-segment packet walk, where the objective is 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. Here the requirement is instead to locate distributed inter-subnet routing in the packet walk; that step does not directly satisfy it.
D:Correct the Edge TEP transport VLAN and endpoint reachability would address the separate case of edge tep vlan inconsistency, where the objective is to bring Edge transport traffic onto the intended tunnel network. An Edge can reach physical peers through uplinks while its separate overlay tunnel interfaces are misconfigured. Here the requirement is instead to locate distributed inter-subnet routing in the packet walk; that step does not directly satisfy it.
Question 891
A change review examines the following situation: A new VM placement causes authorized east-west traffic to fail with no physical-link alarm. Which practice would most directly undermine the requirement to identify the security rule that blocks the workload flow?
- adding unrelated Tier-1 segment route settings while the VPC TGW route source is disabled
- tuning BGP hold timers while the directly connected VLAN is unavailable
- rebooting the leaf switch when host-level policy is clearly dropping packets
- using only an individual VM performance chart as an end-to-end network map
Explanation
Correct Answer
C:The anti-pattern, rebooting the leaf switch when host-level policy is clearly dropping packets, directly conflicts with the requirement to identify the security rule that blocks the workload flow. Workload policy can deny a flow even when logical routing and physical transport work. The safer action is to inspect DFW rule matches and the path through host enforcement.
Incorrect Answers
A:That practice primarily harms the distinct transit gateway route missing activity, in which the goal is to advertise Transit Gateway routes required for VPC external access. Its failure mechanism is less direct for this specific distributed firewall rule diagnostics review. Here the key requirement is to identify the security rule that blocks the workload flow.
B:That practice primarily harms the distinct fabric vlan mismatch activity, in which the goal is to restore Layer-2 adjacency on the correct external uplink VLAN. Its failure mechanism is less direct for this specific distributed firewall rule diagnostics review. Here the key requirement is to identify the security rule that blocks the workload flow.
D: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 distributed firewall rule diagnostics review. Here the key requirement is to identify the security rule that blocks the workload flow.
Question 892
A reviewer must validate the intended NSX outcome. Situation: A VPC public subnet sends traffic to corporate networks, but its prefix never reaches the upstream routers. Which result most directly demonstrates that the team can advertise the public VPC network through the centralized external path?
- The route appears among permitted outbound networks and upstream route advertisement succeeds.
- The intended prefixes appear in the Tier-0 advertised route list and peer routing table.
- After the zone correction, the segment becomes available in the intended host cluster.
- The physical BGP peer learns the VPC public network after the correct redistribution source is enabled.
Explanation
Correct Answer
D:The physical BGP peer learns the VPC public network after the correct redistribution source is enabled. This observation validates the specified public subnet external reachability outcome. VPC Transit Gateway routes are not automatically included in every Tier-0 external protocol advertisement.
Incorrect Answers
A:This would validate vpc external ip block policy rather than the needed public subnet external reachability 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 advertise the public VPC network through the centralized external path.
B:This would validate route redistribution sources rather than the needed public subnet external reachability 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 advertise the public VPC network through the centralized external path.
C:This would validate transport zone eligibility rather than the needed public subnet external reachability result. Transport zone participation governs where segments can appear for workload attachment. For the present case, the evidence must show that the team can advertise the public VPC network through the centralized external path.
Question 893
An architect proposes the following step: run an onboarding checklist for addressing, certificates, transport zones, uplinks, routing and recovery. The context is: A new location is being added with managers, Edge nodes and external BGP peers. What is the strongest technical reason for that decision?
- Fleet onboarding succeeds only when the control, transport, external and operational dependencies agree.
- Edge nodes host centralized service-router functions that cannot be implemented solely by hypervisor distributed forwarding.
- Distributed routing localizes many inter-segment flows on transport hosts, avoiding a centralized Edge hop.
- Fleet-level change governance avoids simultaneous loss of redundant links or management reachability.
Explanation
Correct Answer
A:Fleet onboarding succeeds only when the control, transport, external and operational dependencies agree. This explains the proposed decision in the current fleet onboarding checklist situation. The intended outcome is to reduce skipped prerequisites during fleet expansion, and verification would show: Post-onboarding validation shows healthy management, TEP reachability, BGP and restore readiness.
Incorrect Answers
B:This statement can describe a edge services problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to place stateful and external-routing services in the right data plane; here the relevant requirement is to reduce skipped prerequisites during fleet expansion.
C:This statement can describe a same-host east-west locality problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to minimize unnecessary network transit while retaining routed segmentation; here the relevant requirement is to reduce skipped prerequisites during fleet expansion.
D:This statement can describe a change-window coordination problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to preserve available connectivity during cross-instance maintenance; here the relevant requirement is to reduce skipped prerequisites during fleet expansion.
Question 894
An architect proposes the following step: configure central syslog forwarding and validate downstream retention. The context is: External auditors require six-month retention of NSX operational logs, but local retention is shorter. What is the strongest technical reason for that decision?
- Compatible software levels are required for reliable global intent distribution and realization.
- Remote log collectors can hold events beyond local appliance rotation while preserving timestamps.
- Correct ownership and scope avoid accidental impact on other locations.
- Edge resource pressure can impair gateway operation independently of route-policy correctness.
Explanation
Correct Answer
B:Remote log collectors can hold events beyond local appliance rotation while preserving timestamps. This explains the proposed decision in the current syslog destination situation. The intended outcome is to preserve searchable NSX evidence for required periods, and verification would show: Known NSX test events appear on the collector and remain retrievable under policy.
Incorrect Answers
A:This statement can describe a version preflight problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to avoid unsupported Federation control-plane combinations; here the relevant requirement is to preserve searchable NSX evidence for required periods.
C:This statement can describe a federation location governance problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to keep the scope of networking objects explicit during Federation rollout; here the relevant requirement is to preserve searchable NSX evidence for required periods.
D:This statement can describe a edge health operations problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to avoid service instability from exhausted Edge resources; here the relevant requirement is to preserve searchable NSX evidence for required periods.
Question 895
A reviewer must validate the intended NSX outcome. Situation: A payment network inside NSX must exchange subnet routes with the campus physical fabric. Which result most directly demonstrates that the team can design a clear north-south routing demarcation?
- The same synthetic traffic profile shows a repeatable improvement with stable test conditions.
- External flow tests generate gateway-rule hits and matched traffic is allowed or denied as designed.
- BGP adjacency and advertised/received prefix tables agree at the virtual and physical sides.
- Loss of any one host still leaves supported service capacity and healthy routing.
Explanation
Correct Answer
C:BGP adjacency and advertised/received prefix tables agree at the virtual and physical sides. This observation validates the specified external uplink routing outcome. The Tier-0 external interface provides the route exchange boundary and accommodates physical-network reachability.
Incorrect Answers
A:This would validate reproducible optimization rather than the needed external uplink routing result. Controlled test methodology is necessary to distinguish genuine datapath improvements from variable workloads. For the present case, the evidence must show that the team can design a clear north-south routing demarcation.
B:This would validate gateway firewall placement rather than the needed external uplink routing result. Gateway firewall policies operate at the gateway service boundary and serve a different placement than DFW microsegmentation. For the present case, the evidence must show that the team can design a clear north-south routing demarcation.
D:This would validate capacity versus redundancy rather than the needed external uplink routing result. Throughput gains do not provide high availability if every service node fails with the same host. For the present case, the evidence must show that the team can design a clear north-south routing demarcation.
Question 896
A change review examines the following situation: A regional site must retain local network forwarding during a temporary outage of its Global Manager connection. Which practice would most directly undermine the requirement to keep site data-plane operations resilient to central management interruption?
- forcing all internal routes through a centralized service router for no technical reason
- deploying a single active-standby Edge and assuming both nodes forward all flows simultaneously
- calling the design disaster-ready solely because the second Local Manager is online
- placing the only forwarding data plane on the Global Manager virtual machines
Explanation
Correct Answer
D:The anti-pattern, placing the only forwarding data plane on the Global Manager virtual machines, directly conflicts with the requirement to keep site data-plane operations resilient to central management interruption. Global management coordination is separate from existing local data-plane forwarding and site health. The safer action is to maintain healthy Local Manager and local transport/Edge infrastructure in each site.
Incorrect Answers
A:That practice primarily harms the distinct distributed routing efficiency activity, in which the goal is to reduce centralized transit for traffic that can route locally. Its failure mechanism is less direct for this specific local survivability review. Here the key requirement is to keep site data-plane operations resilient to central management interruption.
B:That practice primarily harms the distinct active-active transit capacity activity, in which the goal is to support north-south path sharing without a single forwarding Edge. Its failure mechanism is less direct for this specific local survivability review. Here the key requirement is to keep site data-plane operations resilient to central management interruption.
C:That practice primarily harms the distinct disaster recovery verification activity, in which the goal is to prove end-to-end multisite recovery readiness. Its failure mechanism is less direct for this specific local survivability review. Here the key requirement is to keep site data-plane operations resilient to central management interruption.
Question 897
A change review examines the following situation: A VCF Kubernetes workload needs to understand which logical networks and gateway paths carry its cluster traffic. Which practice would most directly undermine the requirement to align container networking integration with the NSX and vSphere design?
- assuming every Kubernetes pod communicates through a physical VLAN trunk directly
- relying only on temporary in-memory dashboard event history for a long retention requirement
- changing a workload VM IP before checking the missing upstream VPC route
- using an NSX Tier-0 BGP neighbor as if it performed HTTP backend health checks
Explanation
Correct Answer
A:The anti-pattern, assuming every Kubernetes pod communicates through a physical VLAN trunk directly, directly conflicts with the requirement to align container networking integration with the NSX and vSphere design. Kubernetes overlay and NSX integration requires understanding workload, node and external routing paths. The safer action is to map supported Supervisor/VKS network objects to their underlying NSX connectivity.
Incorrect Answers
B:That practice primarily harms the distinct syslog destination activity, in which the goal is to preserve searchable NSX evidence for required periods. Its failure mechanism is less direct for this specific kubernetes connectivity mapping review. Here the key requirement is to align container networking integration with the NSX and vSphere design.
C:That practice primarily harms the distinct vpc troubleshooting order activity, in which the goal is to isolate VPC routing, advertisement and upstream return-path faults. Its failure mechanism is less direct for this specific kubernetes connectivity mapping review. Here the key requirement is to align container networking integration with the NSX and vSphere design.
D:That practice primarily harms the distinct avi load-balancer service activity, in which the goal is to implement a managed application load-balancing layer. Its failure mechanism is less direct for this specific kubernetes connectivity mapping review. Here the key requirement is to align container networking integration with the NSX and vSphere design.
Question 898
A change review examines the following situation: A shared workload segment is planned for two sites but the remote tunnel transport is absent. Which practice would most directly undermine the requirement to prepare the data-plane prerequisites of a stretched overlay network?
- assuming a Global Manager saved notification means every host immediately enforces the rule
- publishing a stretched segment without testing cross-site tunnel reachability
- leaving all Edge nodes outside any service cluster while expecting auto-placement
- concluding all NSX transport nodes are overloaded based only on internet latency
Explanation
Correct Answer
B:The anti-pattern, publishing a stretched segment without testing cross-site tunnel reachability, directly conflicts with the requirement 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. The safer action is to validate local and remote tunnel endpoint networking before enabling the stretched segment.
Incorrect Answers
A:That practice primarily harms the distinct global rule realization activity, in which the goal is to realize intended global policy on every targeted Local Manager. Its failure mechanism is less direct for this specific stretched segment preparation review. Here the key requirement is to prepare the data-plane prerequisites of a stretched overlay network.
C:That practice primarily harms the distinct edge cluster membership activity, in which the goal is to make supported Edge capacity available to gateway service routers. Its failure mechanism is less direct for this specific stretched segment preparation review. Here the key requirement is to prepare the data-plane prerequisites of a stretched overlay network.
D:That practice primarily harms the distinct edge capacity indicators activity, in which the goal is to detect bottlenecks on centralized Edge services. Its failure mechanism is less direct for this specific stretched segment preparation review. Here the key requirement is to prepare the data-plane prerequisites of a stretched overlay network.
Question 899
A reviewer must validate the intended NSX outcome. Situation: A more general NAT rule intercepts traffic before a specific partner translation can match. Which result most directly demonstrates that the team can make the specific translation take effect for the partner destination?
- A known test NSX event appears in the designated logging index with source and timestamp.
- A same-host denied flow generates the expected distributed firewall rule hit.
- A packet trace shows the specific partner rule matching and translating the expected addresses.
- Outside packet capture shows the correct translated egress address with working return traffic.
Explanation
Correct Answer
C:A packet trace shows the specific partner rule matching and translating the expected addresses. This observation validates the specified nat rule overlap outcome. Overlapping translation criteria can cause an unintended earlier rule to handle a session.
Incorrect Answers
A:This would validate central syslog integration rather than the needed nat rule overlap result. Centralized logs make it easier to correlate events across the management and gateway environment. For the present case, the evidence must show that the team can make the specific translation take effect for the partner destination.
B:This would validate distributed versus gateway firewall rather than the needed nat rule overlap result. Gateway firewall policy alone cannot inspect a flow that never reaches the external service boundary. For the present case, the evidence must show that the team can make the specific translation take effect for the partner destination.
D:This would validate vpc egress nat design rather than the needed nat rule overlap result. Private-address VPC egress requires a deliberate routable path and translation if external peers cannot return to private space. For the present case, the evidence must show that the team can make the specific translation take effect for the partner destination.
Question 900
Outgoing translated sessions reach a partner, but their responses enter through an unsupported different stateful path. The engineering team needs to make the gateway return path compatible with NAT and connection state. What action best addresses the immediate requirement?
- test DNS forwarding configuration and reachable upstream resolvers
- trace the source segment through host Tier-1 distributed routing and destination segment
- walk the source Tier-1, the shared Tier-0 routing tier and the destination Tier-1 as configured
- review route preferences, gateway HA and return-path state handling
Explanation
Correct Answer
D:Stateful translations require return flows to reach a component that has or can recover the appropriate session state. The selected action, review route preferences, gateway HA and return-path state handling, directly supports the specified goal to make the gateway return path compatible with NAT and connection state. A useful confirmation is: Bidirectional captures show accepted responses on the supported service-router path.
Incorrect Answers
A:Test DNS forwarding configuration and reachable upstream resolvers would address the separate case of dns versus transport fault, where the objective is to distinguish name resolution failure from the routed packet path. Successful direct-IP traffic suggests the initial failure is name resolution rather than generic external routing. Here the requirement is instead to make the gateway return path compatible with NAT and connection state; that step does not directly satisfy it.
B:Trace the source segment through host Tier-1 distributed routing and destination segment would address the separate case of inter-segment same-host routing, where the objective is to locate distributed inter-subnet routing in the packet walk. Eligible east-west logical routing is performed by the distributed dataplane instead of requiring an Edge hop. Here the requirement is instead to make the gateway return path compatible with NAT and connection state; that step does not directly satisfy it.
C:Walk the source Tier-1, the shared Tier-0 routing tier and the destination Tier-1 as configured would address the separate case of two tier-1 gateways through tier-0, where the objective is 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. Here the requirement is instead to make the gateway return path compatible with NAT and connection state; that step does not directly satisfy it.