VMware 3V0-23.25 問題集

質問 1：
An administrator is monitoring a vSAN ESA backed workload domain that is dedicated for running AI inferencing. When the administrator navigates to the Storage Performance dashboard in VMware Cloud Foundation Operations, the performance dashboard shows:
* High backend write latency ( > 8 ms)
* Low read latency ( < 1 ms)
* Normal network throughput
* Disk Group Health = Green
Based on the readings above, what would be the explanation?
A. A wrongly sized read cache tier is throttling the write buffer, thus forcing the reads to trespass to the capacity tier.
B. A vSAN network congestion event on the vSAN TCP port 2233 is throttling mirror acknowledgements.
C. The workload's small-block writes are compressed inline, lowering backend throughput and increasing cache misses.
D. This is caused due to transient commit-queue delays, since the workload is exhibiting random-writes saturating ESA's write buffer.
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 2：
An administrator has been tasked with deploying vSAN Data Protection in a VMware Cloud Foundation (VCF) Workload Domain. The administrator deploys the VMware Live Recovery OVA and logs into the management interface to start the Configure Appliance process, but the appliance fails to register with vCenter.
What are two possible causes the administrator can check to resolve the issue? (Choose two.)
A. The vCenter Server user account used for registration does not have the required permissions.
B. The appliance is using DHCP IP addresses for management.
C. The vCenter Server user account was created locally on the VCSA Photon OS level.
D. The vSAN Data Protection appliance was deployed to a non-vSAN datastore.
E. The forward and reverse DNS resolution between the appliance and vCenter Server are not properly configured.
正解：A,E
解説: (Topexam メンバーにのみ表示されます)

質問 3：
A VMware Cloud Foundation (VCF) environment runs mixed workloads (Online Transaction Processing (OLTP) + analytics), with the following vSAN configuration:
* 8 hosts (all-flash), ESA enabled.
* Each host: 2 x 3.2 TB NVMe devices.
* Compression is Enabled.
* Checksum is Enabled.
* Storage Policy: FTT=1 (RAID-5/6), Failures to Tolerate = 1 and Object Space Reservation = 0%.
During peak OLTP load, vSAN resync I/O and backend congestion increase latency despite having sufficient network bandwidth.
What is the direct action the administrator can perform to improve write performance while maintaining data protection compliance?
A. Convert policy to RAID-1 (FTT=1) for latency-sensitive workloads while keeping compression enabled.
B. Increase FTT to 2 with RAID-5/6 and disable compression.
C. Increase object reservation to 100% to pre-allocate capacity and prevent log-structuring overhead.
D. Disable checksums to reduce metadata writes on NVMe devices.
正解：A
解説: (Topexam メンバーにのみ表示されます)

質問 4：
In a vSAN ESA cluster, one host goes offline unexpectedly for more than an hour.
When it returns online, vSAN needs to rebuild and restore compliance for several objects that became degraded during the outage.
Drag and drop the three correct options for the automatic recovery process from the Options list on the left and place them into the Valid Actions on the right in any order. (Choose three.)

正解：

Explanation:
The Repair Delay Timer expires, and vSAN starts automatic repair evaluation.
Once data resync completes, objects are marked as Compliant again.
vSAN verifies policy requirements and rebuilds missing components on available capacity devices.
When a host goes offline unexpectedly, vSAN treats the missing components as absent and waits for the configured repair delay timer before initiating rebuild operations. This prevents unnecessary resynchronization when a host or device returns quickly. In this scenario, the host is offline for more than an hour, so the repair delay timer expires and vSAN begins automatic repair evaluation. vSAN then checks the assigned storage policies, available capacity, and fault-domain placement requirements to determine whether missing components can be rebuilt safely on available capacity devices. If sufficient capacity and fault domains exist, vSAN creates replacement components and starts resynchronization. When the resync process finishes and the affected objects again satisfy their assigned policies, the objects are marked Compliant. The administrator does not need to manually run a resync task from vCenter, and the host does not need to be placed into maintenance mode for automatic repair. A full cluster rebalance is a separate capacity-balancing operation and is not required before object repair. Reference topics: vSAN Repair Delay Timer, Object Compliance, Resynchronization, ESA Object Repair.

質問 5：
An administrator wants to protect a site from disaster and re-protect after fail-over. Industry regulations require to change the primary site every six months.
Which two options are required during the inventory mapping and while running the recovery plans to fulfill this requirement? (Choose two.)
A. Use "Prepare reverse mappings" during inventory mapping creation.
B. Once fail-over is successful, reconfigure vSAN data protection to reverse replication.
C. Use a test recovery plan.
D. Extend the network between both sites.
E. Once the fail-over is successful, re-protect from VMware Live Site Recovery.
正解：A,E
解説: (Topexam メンバーにのみ表示されます)

質問 6：
During maintenance on hosts in a four-node vSAN cluster, a host is placed in maintenance mode with the
"Ensure Accessibility" option.
All VMs are running with the Default Storage Policy (RAID-1, FTT=1) which has not been modified from the default settings.
While one of the hosts in the cluster is down for firmware upgrade, a second host in the cluster loses network connectivity.
How will the cluster be affected?
A. All VMs remain accessible; vSAN automatically rebalances to the other hosts.
B. Some VMs become inaccessible until one of the affected hosts return to service.
C. Data is permanently lost for affected objects.
D. vSAN rebuilds missing components immediately on remaining hosts.
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 7：
An administrator has been tasked with providing additional storage to an existing VMware Cloud Foundation (VCF) instance. The administrator decides to configure cross-cluster capacity sharing so that multiple independent vSAN HCI Clusters can consume storage of adjacent vSAN storage resources within the same workload domain.
What is a requirement of cross-cluster capacity sharing?
A. All objects that make up a VM must reside on multiple vSAN datastores.
B. Ensure vSAN client Cluster latency to vSAN server Cluster is minimum 10 milliseconds.
C. Configure vSphere HA failure response for Datastore with APD to be set to Power off and restart VMs.
D. Client and Server vSAN Clusters must have different vSAN architectures.
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 8：
An administrator needs to quickly test a possibly destructive change to a Virtual Machine (VM) in production.
The VM is currently protected by vSAN Data Protection.
Which feature of vSAN Data Protection can be leveraged to achieve this objective?
A. Linked clone
B. Immutable snapshots
C. Multiple snapshot schedules
D. Protection group
E. Replication
正解：A
解説: (Topexam メンバーにのみ表示されます)