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VMware 3V0-25.25 Test Engine Version | Practice 3V0-25.25 Engine

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VMware 3V0-25.25 Exam Syllabus Topics:

Topic
Details

Topic 1

Troubleshoot and Optimize the VMware Solution: This domain focuses on identifying and resolving NSX issues using VCF tools, troubleshooting infrastructure and routing problems, and understanding ECMP, high availability, and packet flows.

Topic 2

Install, Configure, Administrate the VMware Solution: This domain covers NSX implementation including deploying Federation, configuring components, creating Edge Clusters and gateways, managing VPC, stateful services, tenancy, integrations, and operational tasks.

Topic 3

Plan and Design the VMware Solution: This domain addresses NSX design including architecture, connectivity solutions, multisite deployments, NSX Fleet considerations, and optimization decisions based on given scenarios.

Topic 4

VMware Products and Solutions: This domain focuses on VMware's core offerings including vSphere for virtualization, NSX for software-defined networking, and vSAN for storage, enabling private and hybrid cloud environments.

Topic 5

IT Architectures, Technologies, Standards: This domain covers foundational IT structural designs like client-server and microservices, implementation technologies such as containerization and APIs, and industry standards like ISO
IEC, TOGAF, and security frameworks.

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VMware Advanced VMware Cloud Foundation 9.0 Networking Sample Questions (Q49-Q54):

NEW QUESTION # 49
An administrator was asked to explain the characteristic and requirements of Centralized Connectivity Mode which is planned to be configured in one of the workload domains in VMware Cloud Foundation (VCF) environment.
Drag and drop four options from the Options list on the left and place them into the Centralized Connectivity Mode on the right in any order. (Choose four.)

Answer:

Explanation:

Explanation:
* Requires the deployment of an NSX Edge cluster to host the Tier-0 gateway.
* It can be configured during the deployment of the workload domain.
* It supports stateful services configuration.
* It is suitable for environments that require a streamlined network with limited NSX networking services.
InVMware Cloud Foundation (VCF) 9.0, the networking architecture introduces specialized connectivity modes to cater to different organizational needs, withCentralized Connectivity Modebeing a primary option for streamlined deployments. This mode is fundamentally anchored to the physical infrastructure via localized resources rather than distributed components across the entire cluster.
The most critical technical requirement for this mode is that itrequires the deployment of an NSX Edge cluster to host the Tier-0 gateway. Unlike distributed models, centralized connectivity funnels North-South traffic through specific Edge nodes that serve as the demarcation point between the virtual overlay and the physical Top-of-Rack (ToR) switches. This centralization is what enables the next key characteristic: it supports stateful services configuration. Because traffic is anchored to specific Service Routers (SR) on Edge nodes, stateful operations such as NAT, Load Balancing, and stateful firewalls can maintain session persistence, which is not natively possible in a purely distributed Active/Active ECMP environment without specialized configuration.
From a lifecycle perspective, this mode is highly integrated into the SDDC Manager workflows andcan be configured during the deployment of the workload domain. This allows architects to define the networking posture of a new domain at "Day 0," ensuring that the necessary Edge resources and Tier-0/Tier-1 hierarchies are provisioned automatically to meet the domain's specific requirements.
Finally, Centralized Connectivity Modeis suitable for environments that require a streamlined network with limited NSX networking services. It provides a "cloud-lite" approach to networking, offering the necessary isolation and security of NSX without the complexity of managing a full-scale distributed fabric.
This makes it an ideal choice for smaller workload domains, specialized labs, or legacy application environments that do not require the massive scale of a distributed transit gateway but still need robust stateful security and simplified North-South egress.

NEW QUESTION # 50
An administrator has observed an NSX Local Manager (LM) outage at the secondary Site. However, the NSX Global Manager (GM) in secondary Site remains operational. What happens to data plane operations and policy enforcement at the secondary site?

A. The data plane operates normally until LM recovery and reconnection.
B. Secondary site must failover all workloads to Primary site.
C. Only local policies work; global policies cease to apply on the secondary site.
D. All traffic is blocked until secondary site LM recovers.

Answer: A

Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
The architecture ofNSX Federationwithin a VCF Multi-Site design is built upon a separation of theControl Planeand theData Plane. This "decoupled" architecture ensures high availability and resiliency even when management components become unavailable.
In NSX Federation, theGlobal Manager (GM)handles the configuration of objects that span multiple locations, while theLocal Manager (LM)is responsible for pushing those configurations down to the local Transport Nodes (ESXi hosts and Edges) within its specific site. When a configuration is pushed, the Local Manager communicates with theCentral Control Plane (CCP)and subsequently theLocal Control Plane (LCP)on the hosts.
If an NSX Local Manager goes offline, the "Management Plane" for that site is lost. This means no new segments, routers, or firewall rules can be created or modified at that site. However, the existing configuration is already programmed into theData Plane(the kernels of the ESXi hosts and the DPDK process of the Edge nodes).
According to VMware's "NSX Multi-Location Design Guide," the data plane remains fully operational during a Management Plane outage. Existing VMs will continue to communicate, BGP sessions on the Edges will remain established, and Distributed Firewall (DFW) rules will continue to be enforced based on the last known good configuration state cached on the hosts. The data plane does not require constant heartbeats from the Local Manager to forward traffic. Therefore, operations continue normally "headless" until the LM is restored and can resume synchronization with the Global Manager and local hosts. Failover to a primary site (Option D) is only necessary if the actual data plane (hosts/storage) fails, not just the management components.

NEW QUESTION # 51
Which two requirements are part of the registration process for Local Manager (LM) to a Global Manager (GM) in NSX for centralized management of network and security services across different workload domains deployed in separate locations? (Choose two.)

A. The external load balancer VIP is used for NSX Managers without requiring node API certificate updates.
B. The GM-Active requests the LM IP / FQDN and admin credentials for registration.
C. The LM will validate the GM license to perform the GM registration.
D. The IP / FQDN of any of the 3 LM must be used for registration.
E. The LM Cluster VIP / FQDN is provided for GM-LM communication.

Answer: B,E

Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
NSX Federationis the architectural framework used withinVMware Cloud Foundation (VCF)to provide consistent networking and security across multiple sites. The core of this framework is the relationship between theGlobal Manager (GM)and one or moreLocal Managers (LMs).
The registration process is the critical first step in establishing this "parent-child" relationship. According to the "NSX-T Data Center Administration Guide" and Federation-specific documentation, the registration is initiated from theActive Global Manager.
* Initiation and Credentials (Requirement E):The administrator logs into the Global Manager UI and navigates to the "System > Fabric > Locations" section. To add a new site, the GM-Active requires the IP address or FQDNof the target Local Manager and theAdmin credentials. This allows the GM to authenticate with the LM, exchange security certificates, and establish a secure thumbprint-verified connection.
* Stable Communication Endpoint (Requirement C):For the ongoing management and synchronization of "Global Objects" (like Tier-0s or Security Groups), the GM must communicate with the LM cluster as a whole rather than a single individual node. Therefore, theLM Cluster Virtual IP (VIP)or aFQDNpointing to that VIP is provided. Using the VIP ensures that if the specific LM node that initially handled the registration fails, the GM can continue to communicate with the remaining nodes in the LM cluster without administrative intervention.
Option A is incorrect because the Global Manager typically manages the licensing for the federation, not the LM validating the GM. Option B is incorrect as an external load balancer is not a prerequisite for the native GM-LM registration handshake. Option D is incorrect because providing the IP of an individual node (one of the three) does not provide the high availability required for a production Federation environment. Thus, the use of theCluster VIPand theGM-Active's request for LM credentialsare the verified procedural requirements.

NEW QUESTION # 52
In an NSX environment, an administrator is observing low throughput and intermittent congestion between the Tier-0 Gateway and the upstream physical routers. The environment was designed for high availability and load balancing, using two Edge Nodes deployed in Active/Active mode. The administrator enables ECMP on the Tier-0 gateway, but the issues persist. Which action would address low throughput and congestion?

A. Convert Tier-1 gateways to be edgeless.
B. Disable NAT on the Tier-0 gateway.
C. Deploy additional Edge nodes.
D. Add an additional vNIC to the NSX Edge node.

Answer: C

Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
When aVMware Cloud Foundation (VCF)environment experiences North-South congestion at theTier-0 Gateway, it typically indicates that the processing capacity of the existingNSX Edge Nodeshas been reached.
In anActive/Activeconfiguration, the Tier-0 gateway utilizesEqual Cost Multi-Pathing (ECMP)to distribute traffic across all available Edge nodes in the cluster.
If a two-node Edge cluster is saturated despite ECMP being enabled, the standard "Scale-Out" procedure is to deploy additional Edge nodes(Option D). NSX supports up to8 Edge nodesin a single cluster for a Tier-0 gateway. By adding more nodes, the administrator increases the total number of CPU cores dedicated to the DPDK (Data Plane Development Kit) packet processing engine. Each additional node provides more
"bandwidth lanes" for the ECMP hash to utilize, effectively multiplying the aggregate throughput capability of the North-South exit point.
Option A is incorrect because "edgeless" Tier-1 gateways (Distributed Routers only) improve East-West performance by keeping traffic on the ESXi hosts, but they do not help with North-South traffic that must eventually hit a Tier-0 Service Router on an Edge. Option B (Disabling NAT) might reduce CPU overhead slightly, but it doesn't solve a fundamental capacity bottleneck and is often not an option due to architectural requirements. Option C (Adding a vNIC) does not increase the underlying compute/DPDK processing power of the Edge VM and can sometimes complicate the load-balancing hash.
In VCF operations, this expansion is handled via theSDDC Manager, which can automate the addition of new Edge nodes to an existing cluster, ensuring they are configured symmetrically with the correct uplink profiles and BGP peering sessions. This horizontal scaling is the verified method for resolving congestion in high-demand VCF networking environments.

NEW QUESTION # 53
An administrator must prevent a new VPC from exporting any of its prefixes to the datacenter while still receiving a default route. Where should the routing policy be applied?

A. On the VPC Gateway Firewall
B. On the providers' BGP peer template
C. On the VPC's Transit Gateway
D. On the VPC default route advertiser

Answer: C

Explanation:
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
In the advanced networking architecture ofVMware Cloud Foundation (VCF) 9.0and the evolution ofNSX VPCs, the control of route propagation is managed through the relationship between the consumer (the VPC) and the provider (the Tier-0 or Tier-1 Gateway). When a VPC is created, it is logically connected to the provider's infrastructure via aTransit Gateway(or a Provider-side logical router acting as a transit point).
To control the flow of routing information-specifically to prevent the data center's physical network from learning about internal VPC subnets (prefixes) while ensuring the VPC can still reach the outside world via a default route-the routing policy must be applied at the point of intersection. TheTransit Gatewayserves as this demarcation point. By applying a route filter or prefix list on the Transit Gateway, the administrator can explicitly deny the advertisement of internal VPC prefixes "upstream" to the provider's BGP process.
Simultaneously, the provider can still inject or "advertise" a default route ($0.0.0.0/0$) "downstream" into the VPC.
Applying the policy on theVPC Gateway Firewall(Option D) would impact the data plane (blocking traffic) but would not prevent the routing table from being populated. TheBGP peer template(Option C) is too broad, as it would likely affect all VPCs connected to that provider, rather than just the "new VPC" in question. Thedefault route advertiser(Option A) only controls the egress of the default route, not the suppression of internal prefixes. Therefore, the Transit Gateway is the verified location for granular route control in a multi-tenant VCF VPC environment.

NEW QUESTION # 54
......

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