3V0-23.25試験の準備方法｜一番優秀な3V0-23.25試験時間試験｜信頼的なAdvanced VMware Cloud Foundation 9.0 Storage日本語版復習指南

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VMware 3V0-23.25 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Storage Lifecycle Management	15%	- Compliance and health checks 1. Configuration drift detection 2. Hardware compatibility and validation - Lifecycle management with SDDC Manager 1. Firmware and driver management 2. Update and upgrade workflows
Topic 2: Disaster Recovery and Business Continuity	10%	- vSphere Replication configuration - Site Recovery Manager integration - Failover and failback operations
Topic 3: vSAN Deployment and Configuration	25%	- Advanced configuration 1. File services and iSCSI services 2. Encryption and security settings 3. Stretched cluster and fault domains - Cluster deployment and expansion 1. Disk group configuration and optimization 2. Node addition and replacement
Topic 4: Performance Optimization and Monitoring	20%	- Monitoring and troubleshooting 1. Log analysis and error identification 2. Aria Operations integration 3. vSAN performance views and metrics - Performance tuning 1. I/O limit and QoS configuration 2. Resiliency and performance balance 3. Cache and capacity tier optimization
Topic 5: VMware Cloud Foundation Storage Architecture and Design	20%	- vSAN Architecture in VCF Environment 1. Storage domains and workload domain integration 2. vSAN OSA and ESA differences and use cases 3. I/O path and data flow design - Storage Policy Based Management (SPBM) 1. Policy design and compliance 2. Policy mapping and inheritance
Topic 6: Advanced Storage Solutions	10%	- External storage integration - Storage for Kubernetes workloads - Multi-cloud storage management

>> 3V0-23.25試験時間 <<

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VMware Advanced VMware Cloud Foundation 9.0 Storage 認定 3V0-23.25 試験問題 (Q52-Q57):

質問 # 52
An administrator is tasked designing a vSAN storage solution while respecting the following requirements:
* Must use vSAN ESA
* Must be stretched between two data centers
* Must configure Failures to tolerate = 1
* Must configure Erasure Coding
How many components per Virtual Machine (VM) will be created?

A. 0
B. 1
C. 2
D. 3

正解：D

解説：
With vSAN ESA and Failures to tolerate set to 1 using RAID-5/6 Erasure Coding, vSAN creates an optimized RAID-5 format based on the number of available fault domains. The documentation states that if five or fewer fault domains are available, ESA lists three components for RAID-5. This corresponds to a 2+1 erasure-coded layout, where two data components and one parity component are created. The stretched-cluster setting affects the site disaster tolerance rule, while the stated Failures to tolerate rule with erasure coding defines the local object protection method. The policy note also states that in a vSAN stretched cluster, the RAID-5/6 erasure coding failure tolerance method applies to the Site disaster tolerance setting. Given the answer choices, the ESA optimized RAID-5 component layout that matches FTT=1 erasure coding is three components. One or two components would not provide erasure-coded protection, and four components represents a generic RAID-5 fault-domain requirement rather than the ESA optimized component count shown in placement details. Reference topics: vSAN ESA RAID-5, Failures to Tolerate, Erasure Coding, Stretched Cluster Storage Policy.

質問 # 53
In a symmetrical vSAN Stretched Cluster configuration, both the Primary Data Center (Site A) and the Secondary Data Center (Site B) have active compute and storage resources.
Why does the vSAN architectural specification strictly require the administrator to manually designate one specific site as the "Preferred Fault Domain"?

A. It dictates the direction of the asynchronous replication; data must always be written to the Preferred site first before being staged to the Secondary site.
B. The "Preferred" site tag enables the log-structured filesystem; the Secondary site is forced to run standard block mode until a failover occurs.
C. If the network link to the Witness Appliance fails (a dual-site partition), the cluster needs an automated tie-breaker; the Distributed Object Manager (DOM) will automatically keep the "Preferred" site active and freeze the "Secondary" site to prevent split-brain.
D. The Preferred site is the only site allowed to run the vCenter Server Appliance; the Secondary site is strictly a compute-only disaster recovery target.

正解：C

質問 # 54
A VCF Architect is designing a site disaster recovery strategy for a retail client operating a vSAN Stretched Cluster.
The client's network team has imposed strict limitations on inter-site traffic, noting that the Inter-Site Link (ISL) occasionally drops packets under heavy load. The storage policy is configured with "Dual Site Mirroring" and "Secondary FTT=1 (RAID-1)".
The architect is concerned about how a network partition (ISL failure) interacts with this storage policy regarding object accessibility and capacity planning.
Which of the following statements accurately describe the interaction between the network partition mechanics and the storage policy constraints? (Select all that apply.)

A. If a network partition isolates the Secondary site from both the Preferred site and the Witness, the Secondary site's replica components will transition to the 'Inaccessible' state.
B. A flapping network partition on the ISL could trigger a "Witness bandwidth exhaustion" event if the cluster frequently splits and merges, causing metadata resync storms.
C. The Dual Site Mirroring policy implicitly relies on the Unicast agents maintaining connectivity to the Witness appliance to establish a quorum (>50% of votes) during an ISL failure.
D. The 'Secondary FTT=1 (RAID-1)' rule ensures that workloads on the isolated Secondary site can remain active by consuming the local replica copy without needing the Witness.

正解：A、B、C

質問 # 55
A Solutions Architect is calculating the network bandwidth saturation for a specific VMDK under heavy write load in a vSAN ESA cluster. The available Top-of-Rack switch throughput is limited to
25 GbE.
The VM generates 500 MB/s of raw write data.
The architect evaluates two different Storage Policies applied to this specific VM:
```
[SPBM Configuration Options]
Policy A: Failures To Tolerate: 1 (RAID-1 Mirroring)
Policy B: Failures To Tolerate: 1 (RAID-5 Erasure Coding)
```
How do these different SPBM policies directly alter the actual "on-the-wire" network traffic profile for vSAN, and what is the impact on the 25 GbE fabric? (Select all that apply.)

A. Policy A (RAID-1) generates 1000 MB/s of total backend network traffic (a 2.0x multiplier) because the DOM Client must simultaneously send the 500 MB/s data payload to both Mirror 1 and Mirror 2 across the network.
B. Both policies consume zero network bandwidth for reads when the "Site Locality" feature is enabled.
C. Policy B (RAID-5) significantly reduces the network bandwidth multiplier compared to RAID-1, because the erasure coding algorithm spreads parity overhead (1.33x) rather than duplicating the full dataset.
D. vSAN ESA compresses the data BEFORE it leaves the host (DOM Client level); therefore, if the VM generates highly compressible data (e.g., 2:1 ratio), Policy B will only push ~332 MB/s across the network, preserving the 25 GbE switch buffers.
E. Switching from Policy A to Policy B doubles the network traffic overhead because RAID-5 requires a 4th parity node.

正解：A、C、D

質問 # 56
A SOC Analyst is investigating an SDRS anomaly in a traditional storage VCF Workload Domain. A
10 TB Datastore (DS-01) within a Datastore Cluster reached 95% capacity. Storage DRS is set to "Fully Automated" with a Space Utilization Threshold of 80%.
Despite the critical space exhaustion, SDRS failed to trigger any Storage vMotion operations to evacuate VMs to DS-02 (which has 8 TB free space).
The analyst reviews the vpxd.log:
```
2026-11-22T10:00:15Z INFO vpxd - [SDRS] Running space load balancing for Datastore Cluster 'WLD- Tier1-DS-Cluster'.
2026-11-22T10:00:15Z WARN vpxd - [SDRS] Datastore 'DS-01' exceeds space threshold (95% > 80%).
2026-11-22T10:00:16Z INFO vpxd - [SDRS] Analyzing VM 'Archive-DB-01' for evacuation. VM size: 4 TB.
2026-11-22T10:00:17Z WARN vpxd - [SDRS] Target 'DS-02' violates capability constraints for VM
'Archive-DB-01'. Migration aborted.
2026-11-22T10:00:18Z INFO vpxd - [SDRS] No candidates found to resolve space threshold on 'DS-01'.
```
Based on SDRS mechanics and the log evidence, which TWO scenarios explain why SDRS aborted the migration? (Choose 2.)

A. DS-02 is backed by a different Storage Array type than DS-01, and VAAI offloading is required but unavailable between the arrays.
B. DS-01 and DS-02 reside on different ESXi management network subnets, breaking the Storage vMotion network replication path.
C. The VM Archive-DB-01 is attached to a VMFS-6 ISO file stored locally on DS-01, preventing the storage stack from releasing the file lock.
D. DS-02 has a different VMFS block size (1MB vs 4MB) which prevents the storage vMotion engine from aligning the destination metadata.
E. Archive-DB-01 is assigned a Storage Policy requiring "Data-at-Rest Encryption," but DS-02 is mapped to an unencrypted backend LUN that lacks the required storage capability.

正解：A、E

質問 # 57
......

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