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VMware 3V0-25.25 Practice Test 79

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?

  1. create a VLAN-backed NSX segment with the proper VLAN ID and switch uplink
  2. assign the gateway to a suitable Edge cluster and validate its service router
  3. review the gateway HA mode and service-router placement across the cluster
  4. 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.

Question 781

An architect proposes the following step: track Edge CPU, throughput and service capacity per instance before expansion. The context is: A VCF fleet adds multiple high-throughput tenants while older Edge clusters near resource saturation. What is the strongest technical reason for that decision?

  1. Fleet capacity decisions should use real workload demand and supported Edge sizing rather than only counting instances.
  2. Clear fleet-to-manager mapping prevents cross-instance errors during maintenance and troubleshooting.
  3. Uplink profiles capture NIC teaming, transport VLAN, and uplink placement decisions for the prepared node.
  4. Controlled test methodology is necessary to distinguish genuine datapath improvements from variable workloads.

Explanation

Correct Answer

A:

Fleet capacity decisions should use real workload demand and supported Edge sizing rather than only counting instances. This explains the proposed decision in the current capacity planning situation. The intended outcome is to size future network services from measured demand and headroom, and verification would show: Capacity reports show forecast headroom for Edge nodes and ingress/egress traffic.

Incorrect Answers

B:

This statement can describe a fleet inventory clarity problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to map networking control components to their owning VCF instances; here the relevant requirement is to size future network services from measured demand and headroom.

C:

This statement can describe a uplink profiles problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to apply repeatable physical-uplink mapping during NSX preparation; here the relevant requirement is to size future network services from measured demand and headroom.

D:

This statement can describe a reproducible optimization problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to validate a performance change using controlled measurements; here the relevant requirement is to size future network services from measured demand and headroom.

Question 782

An architect proposes the following step: create a VPC within an authorized NSX Project and connectivity profile. The context is: An application team needs its own managed virtual network without administrator-level access to all NSX gateways. What is the strongest technical reason for that decision?

  1. Transport-zone membership controls where a segment can be realized.
  2. NSX VPC enables scoped self-service networking with provider-defined connectivity and constraints.
  3. Tenant offboarding should clean scoped objects while leaving shared routing and provider services intact.
  4. Delegated self-service requires resource governance so one tenant cannot exhaust shared infrastructure.

Explanation

Correct Answer

B:

NSX VPC enables scoped self-service networking with provider-defined connectivity and constraints. This explains the proposed decision in the current project-scoped vpc creation situation. The intended outcome is to provide delegated workload networking within defined tenant limits, and verification would show: The team can create VPC subnets inside its project but cannot change unrelated infrastructure gateways.

Incorrect Answers

A:

This statement can describe a overlay zone membership problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to make that cluster eligible for the required logical overlay segment; here the relevant requirement is to provide delegated workload networking within defined tenant limits.

C:

This statement can describe a tenant lifecycle cleanup problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to remove the retired tenant without affecting shared provider infrastructure; here the relevant requirement is to provide delegated workload networking within defined tenant limits.

D:

This statement can describe a provider vpc network limits problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to limit tenant network-resource consumption without blocking ordinary self-service; here the relevant requirement is to provide delegated workload networking within defined tenant limits.

Question 783

An architect proposes the following step: inventory and decommission Project-owned resources in dependency order. The context is: A Project is retired, but stale VPCs and policies consume resources and confuse new tenants. What is the strongest technical reason for that decision?

  1. Projects provide administrative and policy boundaries for delegated networking.
  2. Avi adds application-aware balancing and backend health handling beyond ordinary IP routing.
  3. Tenant offboarding should clean scoped objects while leaving shared routing and provider services intact.
  4. IPsec negotiates security associations and encrypts traffic for the agreed protected networks.

Explanation

Correct Answer

C:

Tenant offboarding should clean scoped objects while leaving shared routing and provider services intact. This explains the proposed decision in the current tenant lifecycle cleanup situation. The intended outcome is to remove the retired tenant without affecting shared provider infrastructure, and verification would show: The retired Project has no leftover scoped VPCs or rules; other Projects remain healthy.

Incorrect Answers

A:

This statement can describe a project isolation policy problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to give tenants self-service without cross-tenant administrative rights; here the relevant requirement is to remove the retired tenant without affecting shared provider infrastructure.

B:

This statement can describe a avi load-balancer service problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to implement a managed application load-balancing layer; here the relevant requirement is to remove the retired tenant without affecting shared provider infrastructure.

D:

This statement can describe a ipsec vpn connectivity problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to protect data in transit between controlled gateway endpoints; here the relevant requirement is to remove the retired tenant without affecting shared provider infrastructure.

Question 784

An architect proposes the following step: correct the Edge TEP transport VLAN and endpoint reachability. The context is: A newly added Edge forwards north-south traffic on its physical uplink but cannot access overlay workload segments. What is the strongest technical reason for that decision?

  1. A stretched segment relies on remote TEP transport and applicable distributed policy at each site.
  2. A stable per-flow hash helps avoid reordering but one heavy flow may remain on one path.
  3. A tunnel adds headers, so an underlay MTU mismatch often affects large frames first.
  4. An Edge can reach physical peers through uplinks while its separate overlay tunnel interfaces are misconfigured.

Explanation

Correct Answer

D:

An Edge can reach physical peers through uplinks while its separate overlay tunnel interfaces are misconfigured. This explains the proposed decision in the current edge tep vlan inconsistency situation. The intended outcome is to bring Edge transport traffic onto the intended tunnel network, and verification would show: Edge-to-host tunnel reachability is restored while external interface connectivity remains intact.

Incorrect Answers

A:

This statement can describe a federation stretched-segment path problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to identify cross-site encapsulated Layer-2 forwarding and its policy controls; here the relevant requirement is to bring Edge transport traffic onto the intended tunnel network.

B:

This statement can describe a per-flow ecmp behavior problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to set realistic expectations for multipath balancing; here the relevant requirement is to bring Edge transport traffic onto the intended tunnel network.

C:

This statement can describe a transport mtu blackhole problem but is not the technical cause addressed by the proposed step. In that other situation the objective is to remove encapsulation-induced packet loss on the physical path; here the relevant requirement is to bring Edge transport traffic onto the intended tunnel network.

Question 785

Two data centers each offer internet egress, but workloads should prefer the local exit after migration. The engineering team needs to design predictable local north-south egress by site. What action best addresses the immediate requirement?

  1. plan site-specific Tier-0/Edge paths and validate routing preferences
  2. right-size the Edge nodes and service-router placement based on measured throughput and CPU
  3. remove unsupported source NAT on the Global-to-Local Manager control path and validate direct reachability
  4. create isolated NSX overlay segments and controlled routing boundaries

Explanation

Correct Answer

A:

A stretched network does not automatically determine the best egress; gateway placement and route preferences control it. The selected action, plan site-specific Tier-0/Edge paths and validate routing preferences, directly supports the specified goal to design predictable local north-south egress by site. A useful confirmation is: Traces from each location show the required local egress until a tested failover.

Incorrect Answers

B:

Right-size the Edge nodes and service-router placement based on measured throughput and CPU would address the separate case of edge service sizing, where the objective is to preserve service performance as gateway demand increases. Central services depend on finite Edge resources and require sizing for throughput and resilience. Here the requirement is instead to design predictable local north-south egress by site; that step does not directly satisfy it.

C:

Remove unsupported source NAT on the Global-to-Local Manager control path and validate direct reachability would address the separate case of global-local management communication, where the objective is to establish supported manager-to-manager control connectivity. Federation Manager registration depends on supported and stable control-plane communication between sites. Here the requirement is instead to design predictable local north-south egress by site; that step does not directly satisfy it.

D:

Create isolated NSX overlay segments and controlled routing boundaries would address the separate case of tenant segmentation at scale, where the objective is 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. Here the requirement is instead to design predictable local north-south egress by site; that step does not directly satisfy it.

Question 786

A change review examines the following situation: A global security rule was created but does not appear in enforcement at one connected site. Which practice would most directly undermine the requirement to realize intended global policy on every targeted Local Manager?

  1. adding an arbitrary physical router IP to a segment without defining an NSX gateway connection
  2. assuming a Global Manager saved notification means every host immediately enforces the rule
  3. assuming a replicated configuration alone guarantees uninterrupted stateful session forwarding
  4. using Manager enrollment success as a substitute for real traffic failover testing

Explanation

Correct Answer

B:

The anti-pattern, assuming a Global Manager saved notification means every host immediately enforces the rule, directly conflicts with the requirement to realize intended global policy on every targeted Local Manager. A saved global object is not sufficient if the local site never realizes the policy. The safer action is to check global-group scope and per-site realization status before repairing the targeting issue.

Incorrect Answers

A:

That practice primarily harms the distinct segment gateway attachment activity, in which the goal is to provide routed connectivity through the intended logical gateway. Its failure mechanism is less direct for this specific global rule realization review. Here the key requirement is to realize intended global policy on every targeted Local Manager.

C:

That practice primarily harms the distinct service-router fault tolerance activity, in which the goal is to retain stateful gateway capability through an eligible Edge failure. Its failure mechanism is less direct for this specific global rule realization review. Here the key requirement is to realize intended global policy on every targeted Local Manager.

D:

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 global rule realization review. Here the key requirement is to realize intended global policy on every targeted Local Manager.

Question 787

A change review examines the following situation: Applications require a virtual IP with backend health checks across multiple VCF workload nodes. Which practice would most directly undermine the requirement to implement a managed application load-balancing layer?

  1. embedding a global administrator credential in every application pipeline
  2. ignoring appliance resource alerts until the Edge node stops responding
  3. using an NSX Tier-0 BGP neighbor as if it performed HTTP backend health checks
  4. using only virtual-machine power state to represent the health of external connectivity

Explanation

Correct Answer

C:

The anti-pattern, using an NSX Tier-0 BGP neighbor as if it performed HTTP backend health checks, directly conflicts with the requirement to implement a managed application load-balancing layer. Avi adds application-aware balancing and backend health handling beyond ordinary IP routing. The safer action is to integrate VMware Avi Load Balancer and configure virtual services with health-monitored pools.

Incorrect Answers

A:

That practice primarily harms the distinct network policy api scope activity, in which the goal is to restrict automated NSX changes to the intended object boundary. Its failure mechanism is less direct for this specific avi load-balancer service review. Here the key requirement is to implement a managed application load-balancing layer.

B:

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 avi load-balancer service review. Here the key requirement is to implement a managed application load-balancing layer.

D:

That practice primarily harms the distinct gateway route monitoring activity, in which the goal is to monitor gateway peer state and advertised routes over time. Its failure mechanism is less direct for this specific avi load-balancer service review. Here the key requirement is to implement a managed application load-balancing layer.

Question 788

A reviewer must validate the intended NSX outcome. Situation: Application segments can communicate locally but need an external default route. Which result most directly demonstrates that the team can connect application-facing logical routing to the enterprise external tier?

  1. The DHCP server receives relay requests and clients obtain expected leases.
  2. A controlled Edge outage leaves a recoverable NAT service with expected routing restoration.
  3. The route appears among permitted outbound networks and upstream route advertisement succeeds.
  4. A segment workload reaches approved external destinations and the logical routes are present.

Explanation

Correct Answer

D:

A segment workload reaches approved external destinations and the logical routes are present. This observation validates the specified tier-1 link to tier-0 outcome. The Tier-1 uses northbound connectivity through Tier-0 for external access.

Incorrect Answers

A:

This would validate dhcp relay boundary rather than the needed tier-1 link to tier-0 result. DHCP relay carries broadcast-derived discovery to a remote DHCP service across L3. For the present case, the evidence must show that the team can connect application-facing logical routing to the enterprise external tier.

B:

This would validate tier-1 service continuity rather than the needed tier-1 link to tier-0 result. Stateful gateway services require healthy service-router availability and correctly handled failover. For the present case, the evidence must show that the team can connect application-facing logical routing to the enterprise external tier.

C:

This would validate vpc external ip block policy rather than the needed tier-1 link to tier-0 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 connect application-facing logical routing to the enterprise external tier.

Question 789

A change review examines the following situation: Two VMs on the same ESXi host must be isolated even if they never traverse a Tier-0. Which practice would most directly undermine the requirement to apply security where that east-west flow actually travels?

  1. adding only a Tier-0 gateway firewall rule for two local VM interfaces
  2. configuring only source NAT when inbound clients need destination translation
  3. recreating the segment with a different name rather than fixing transport-zone eligibility
  4. marking HA tested merely because both Edge VMs display a green power icon

Explanation

Correct Answer

A:

The anti-pattern, adding only a Tier-0 gateway firewall rule for two local VM interfaces, directly conflicts with the requirement to apply security where that east-west flow actually travels. Gateway firewall policy alone cannot inspect a flow that never reaches the external service boundary. The safer action is to use distributed firewall policy at the workload interface.

Incorrect Answers

B:

That practice primarily harms the distinct destination nat for published service activity, in which the goal is to direct approved inbound sessions to the private backend. Its failure mechanism is less direct for this specific distributed versus gateway firewall review. Here the key requirement is to apply security where that east-west flow actually travels.

C:

That practice primarily harms the distinct overlay zone membership activity, in which the goal is to make that cluster eligible for the required logical overlay segment. Its failure mechanism is less direct for this specific distributed versus gateway firewall review. Here the key requirement is to apply security where that east-west flow actually travels.

D:

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 distributed versus gateway firewall review. Here the key requirement is to apply security where that east-west flow actually travels.

Question 790

A reviewer must validate the intended NSX outcome. Situation: ESXi transport hosts send overlay packets through a distant routed path even though local TEP subnets exist. Which result most directly demonstrates that the team can lower tunnel RTT and reduce needless underlay hops?

  1. Underlay TEP addresses exchange GENEVE packets and guests communicate on the logical segment.
  2. Network path and RTT measurements improve for TEP-to-TEP exchanges after topology correction.
  3. Existing permitted local workload traffic continues during a controlled loss of global management reachability.
  4. Observed independent flows use multiple live next hops while each flow stays consistent with its path selection.

Explanation

Correct Answer

B:

Network path and RTT measurements improve for TEP-to-TEP exchanges after topology correction. This observation validates the specified host transport locality outcome. An efficient routed fabric and appropriate endpoint placement reduce overlay transport detours.

Incorrect Answers

A:

This would validate overlay fabric reachability rather than the needed host transport locality result. Overlay encapsulation carries L2 traffic across the IP underlay, separating tenant switching from fabric VLAN sprawl. For the present case, the evidence must show that the team can lower tunnel RTT and reduce needless underlay hops.

C:

This would validate local survivability rather than the needed host transport locality result. Global management coordination is separate from existing local data-plane forwarding and site health. For the present case, the evidence must show that the team can lower tunnel RTT and reduce needless underlay hops.

D:

This would validate ecmp load spread rather than the needed host transport locality result. ECMP selects among equal-cost routes, typically per flow, improving aggregate path capacity and redundancy. For the present case, the evidence must show that the team can lower tunnel RTT and reduce needless underlay hops.

Advanced VMware Cloud Foundation 9.0 Networking (3V0-25.25) Practice Tests