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VMware 3V0-25.25 認定試験の出題範囲：

トピック	出題範囲
トピック 1	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.
トピック 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.
トピック 3	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.
トピック 4	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.
トピック 5	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.

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VMware Advanced VMware Cloud Foundation 9.0 Networking 認定 3V0-25.25 試験問題 (Q23-Q28):

質問 # 23
An administrator has deployed a workload domain in VMware Cloud Foundation (VCF). The workload domain was deployed with NSX managers using the XL form factor. After deployment, the administrator realizes the NSX manager is oversized and needs to change to a smaller form factor. What should the administrator do to accomplish this task?

A. Each NSX manager must be resized using the API.
B. Each NSX Manager must be redeployed.
C. Each NSX manager must be rightsized using VCF Operations.
D. Each NSX manager must be resized through vCenter.

正解：B

解説：
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
InVMware Cloud Foundation (VCF), the lifecycle of the NSX Manager cluster is strictly managed by SDDC Manager. During the initial deployment of a Management Domain or the creation of a new Workload Domain (if using a separate NSX instance), the administrator selects a "Form Factor" (Small, Medium, Large, or Extra Large) based on the expected scale of the environment.
As of current VCF versions (including 5.x), theForm Factoris a parameter defined during the deployment workflow that determines the resource reservations (CPU/RAM) and the disk partitioning of the appliance OVA. Unlike a standard virtual machine where you might simply adjust the vCPU and RAM settings in vCenter, the NSX Manager appliance is an opinionated system. Changing resources manually through vCenter (Option C) is not supported and can lead to stability issues or "Out of Sync" errors within SDDC Manager, as the database and internal services are tuned for the specific size selected at install.
There is currently no supported "in-place" upgrade or downgrade for the form factor of an existing NSX Manager node via the UI or API (Option B). To change the size, the administrator mustredeploythe manager nodes. In a VCF context, this often involves using SDDC Manager to delete the cluster or manually replacing nodes one by one-essentially deploying a new node of the correct size, joining it to the management cluster, syncing the data, and then removing the old, oversized node.
VCF Operations(formerly vRealize Operations) can provide "Right-sizing"recommendations(Option D), but it cannot execute the physical resizing of an NSX Manager appliance within the VCF framework. Therefore, the manual or orchestrated redeployment of the nodes is the only verified method to change the appliance footprint.

質問 # 24
An administrator has a VMware Cloud Foundation (VCF) instance. A critical NSX security update has been released by Broadcom. How can the administrator install the NSX update?

A. Download the NSX patch to VCF Operations. Apply it using NSX Manager.
B. Download the NSX patch to VCF Operations. Apply it using VCF Operations Fleet Management.
C. Download the NSX patch to the NSX Manager. Apply it using NSX Manager.
D. Download the NSX patch to the NSX Manager. Apply it using VCF Operations Fleet Management.

正解：B

解説：
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
In the unified architecture ofVMware Cloud Foundation (VCF) 9.0, the management paradigm has shifted towards a more centralized "Fleet Management" approach. Historically, in VCF 4.x and 5.x, updates were primarily managed via the SDDC Manager using the Lifecycle Management (LCM) engine. However, with the integration advancements in version 9.0,VCF Operations(formerly part of the Aria/vRealize suite) has taken on a more direct role in the orchestration of updates across the entire VCF "Fleet." To comply with the VCF operational model, administrators no longer apply patches directly within the component managers (like NSX Manager or vCenter) if they wish to remain within the supported, automated framework. Instead, the workflow begins by downloading the bundle or patch toVCF Operations. This ensures that the update is validated against the currentBill of Materials (BOM)and that all dependencies- such as compatibility with the underlying ESXi versions or the management vCenter-are checked before any changes are committed.
Once the patch is available in VCF Operations, the administrator utilizesFleet Managementto apply it. This service orchestrates the update across all NSX Managers and Transport Nodes (Edges and Hosts) in a controlled, non-disruptive manner. If the administrator were to apply the patch directly in NSX Manager (Option D), the SDDC Manager and VCF Operations databases would go out of sync, leading to a
"configuration drift" where the system no longer knows which version is actually running, potentially breaking future automated lifecycle tasks. Therefore, the centralized download and application throughVCF Operations Fleet Managementis the verified procedure for maintaining a healthy and compliant VCF 9.0 environment.

質問 # 25
An administrator has deployed a new VMware Cloud Foundation (VCF) management domain. To be compliant with company policy, backups must be configured to occur anytime a change is made to the NSX configuration. How can the administrator ensure that complete configuration backups are captured every time a change occurs?

A. Create a recurring backup schedule and explicitly indicate that backups should be captured anytime the configuration changes.
B. Configure an alarm to detect configuration changes and automatically trigger a complete configuration backup.
C. No action is required as by default NSX will automatically perform a complete backup every time a change is made to the configuration.
D. Configure a cron job on the NSX Manager to automatically perform an incremental backup of the NSX configuration every hour.

正解：A

解説：
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
InVMware Cloud Foundation (VCF), the protection of theNSX Managerconfiguration is paramount, as it contains the state of the entire software-defined network, including firewall rules, logical switches, and routing topologies. To meet strict compliance requirements for real-time or change-based protection, NSX offers specific automated backup triggers.
Within theNSX Manager UI(under System > Lifecycle > Backup & Restore), an administrator can configure the backup behavior. While a time-based schedule (e.g., daily at 2:00 AM) is common, it does not satisfy the requirement for backups "anytime a change is made." To accomplish this, the administrator must enable the
"Backup on Configuration Change"toggle within the backup scheduling configuration.
When this feature is enabled, the NSX Manager monitors its own management database (DS) for write operations. Once a configuration change is detected (such as adding a segment or modifying a DFW rule), the system initiates an automated backup process. This ensures that the backup repository always contains a near- instantaneous reflection of the current network state, minimizing data loss in the event of a cluster failure.
Option B is incorrect because this feature is not enabled by default; it requires an external SFTP/FTP server to be configured first. Option C (Cron jobs) is an unsupported manual workaround that bypasses the SDDC- native management tools. Option A is redundant as the functionality is built directly into the NSX backup engine. Consequently, the verified method for compliance is to use thenative recurring backup schedule with the "Detect Configuration Change" option enabled.

質問 # 26
An administrator is configuring NSX resource sharing to allow shared access to multiple resources in the default space.
By default, which user role owns the shared resources for the default space?

A. Enterprise Admin
B. Project Admin
C. Security Admin
D. Network Admin

正解：A

解説：
In NSX Multi-Tenancy (Projects), theEnterprise Adminacts as the provider-level administrator who owns global objects in the default space. This ensures central control over resources that are shared across different projects.

質問 # 27
How should the Global Managers (GMs) and Local Managers (LMs) be distributed to ensure high availability and optimal performance in a multi-site NSX Federation deployment comprised of three sites? (Choose two.)

A. Each NSX site must have its own LM cluster that reports to the GM.
B. LMs should only be deployed as single nodes to reduce overhead.
C. The GM cluster should be deployed across three sites.
D. The GM should be a single appliance placed in a central cloud environment to simplify connectivity, relying on vSphere HA for availability.
E. LMs are only needed on the primary site. Secondary sites can manage their local data plane directly via the GM.

正解：A、C

解説：
Comprehensive and Detailed 250 to 350 words of Explanation From VMware Cloud Foundation (VCF) documents:
In aVMware Cloud Foundation (VCF)Federation deployment across multiple sites, the management architecture is designed to provide "Global Visibility" while maintaining "Local Autonomy." This is achieved through the coordinated distribution ofGlobal Managers (GMs)andLocal Managers (LMs).
For a three-site deployment,NSX Federationbest practices mandate that each site maintains its ownLocal Manager (LM) Cluster(Option A). The LM is responsible for the site-specific control plane, communicating with local Transport Nodes (ESXi and Edges) to program the data plane. If the connection to the GM is lost, the LM ensures the local site continues to function normally. For production environments, these must be clusters (typically 3 nodes) rather than single nodes to ensure local management remains available.
To protect theGlobal Manageritself-which is the source of truth for all global networking and security policies-the GM cluster should bestretched across the three sites(Option D). In a standard 3-node GM cluster, placing one node at each site ensures that the Federation management plane can survive the complete failure of an entire site. This "stretched" cluster configuration provides a high level of resilience and ensures that an administrator can still manage global policies from any surviving location.
Option B is incorrect because the GM does not communicate directly with the data plane of a site; it must go through an LM. Option C is a risk to availability. Option E is incorrect because vSphere HA cannot protect against a site-wide disaster, and a single appliance represents a significant single point of failure for the entire global network configuration.

質問 # 28
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