Updated Oct-2026 Exam Materials for You to Prepare & Pass 3V0-23.25 Exam [Q45-Q62]

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Updated Oct-2026 Exam Materials for You to Prepare & Pass 3V0-23.25 Exam.

Pass Your 3V0-23.25 Exam at the First Try with 100% Real Exam

VMware 3V0-23.25 Exam Syllabus Topics:

Section	Weight	Objectives
Storage Configuration and Management	30%	– Implement and manage storage policies – Manage data services (deduplication, compression, encryption) – Configure and manage vSAN in a VMware Cloud Foundation environment
Integration and Automation	20%	– Use APIs and command-line tools for storage management – Automate storage provisioning and management tasks – Integrate storage components with other VMware Cloud Foundation services
Storage Optimization and Troubleshooting	25%	– Monitor and optimize storage performance and capacity – Perform health checks and implement remediation – Troubleshoot common storage issues in VMware Cloud Foundation
Storage Architecture and Design	25%	– Design vSAN storage solutions for VMware Cloud Foundation – Integrate external storage arrays with VMware Cloud Foundation – Plan for storage capacity, performance, and availability requirements

NEW QUESTION 45
Which statement accurately defines the architectural function of a “Protocol Endpoint” (PE) in a VMware vSphere Virtual Volumes (vVols) storage topology?

The Protocol Endpoint serves as an out-of-band management interface that the vCenter Server uses to communicate storage capabilities with the physical array.

The Protocol Endpoint is a physical storage LUN that holds the VMFS metadata required to lock virtual machine files during vMotion operations.

The Protocol Endpoint acts as an I/O proxy and multipathing demultiplexer, establishing the data path between the ESXi hosts and the individual sub-LUN virtual volumes.

The Protocol Endpoint is a logical abstraction of storage capacity that defines the total available datastore size for virtual machine provisioning.

NEW QUESTION 46
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?

Increase object reservation to 100% to pre-allocate capacity and prevent log-structuring overhead.

Convert policy to RAID-1 (FTT=1) for latency-sensitive workloads while keeping compression enabled.

Increase FTT to 2 with RAID-5/6 and disable compression.

Disable checksums to reduce metadata writes on NVMe devices.

NEW QUESTION 47
A SOC Analyst is investigating a failure in a Tanzu environment where newly deployed stateful Pods are remaining in a Pending state. The pods are failing to bind to their Persistent Volume Claims (PVCs). The analyst reviews the vmkernel.log on the ESXi host running the Kubernetes Supervisor Control Plane:
“`
2026-11-25T14:10:05Z INFO vsphere-csi – Received CreateVolume request:
size=50GB, policy=”High- Perf-vSAN”
2026-11-25T14:10:06Z WARN vsan-dom – Storage Policy “High-Perf-vSAN”
violates cluster capabilities. FTT=2 requires 6 fault domains.
Available: 4.
2026-11-25T14:10:06Z ERROR vsphere-csi – CNS CreateVolume failed.
Reason: Datastore lacks sufficient capacity or domains to satisfy SPBM
profile.
2026-11-25T14:10:06Z ERROR k8s-controller – PVC ‘mysql-data-pvc’ failed to provision. Retrying…
“`
Based on the log analysis, which TWO statements describe the root cause and the required remediation? (Choose 2.)

The ESXi host’s vsphere-csi daemon has crashed and must be restarted via the vCenter VAMI interface.

The Kubernetes ClusterRoleBinding lacks the necessary IAM permissions to execute vCenter API calls.

The PVC request of 50GB exceeds the hardcoded limit for First Class Disks (FCD) in vSAN ESA.

The requested StorageClass references an SPBM policy (FTT=2/RAID-6) that is mathematically impossible to fulfill on the current 4-node vSAN cluster.

The analyst must expand the physical vSAN cluster to a minimum of 6 hosts, or modify the SPBM policy to FTT=1, to allow CNS to provision the volume.

NEW QUESTION 48
A CTO is evaluating storage options for a VCF 9.0 Workload Domain that will host a massive 2 Petabyte medical imaging archive. The applications accessing this archive require minimal compute resources (e.g., just four standard 16-vCPU web servers).
“`
[Customer Requirement]
Capacity: 2,000 TB (2 PB)
Compute: 64 vCPU total (Peak)
Cost Constraint: Minimize software licensing CapEx.
“`
Which statement justifies the selection of an external SAN/NAS solution over a pure vSAN ESA HCI cluster for this specific use case?

VCF explicitly prohibits using vSAN for HIPAA-regulated medical workloads, forcing customers to use external arrays with physical tape backup integration.

Medical imaging requires object-based metadata, which traditional NFS NAS systems provide natively, whereas vSAN strictly provides block-only VMDK storage.

vSAN ESA has a hard cluster limit of 1 Petabyte of raw capacity, making it technically impossible to host this medical archive.

An external NAS can host the 2 PB archive while connected to a small 3-node ESXi cluster, whereas vSAN HCI would force the purchase of 20+ fully licensed “compute-heavy” vSAN ReadyNodes just to acquire the physical drive bays.

NEW QUESTION 49
An administrator reports that after rebooting one host in a vSAN cluster configured with Data-at-Rest Encryption using an external Key Management Server (KMS), the host shows all vSAN disk groups as unmounted.
The KMS is online and reachable from all hosts.
In vCenter, the host displays the following event:
“Failed to retrieve encryption key from KMS.”
Key ID:
All other hosts in the cluster remain healthy and show “Encryption: Enabled.” Why did the encryption key retrieval fail for this host?

The host’s trust relationship or certificate with the KMS is invalid or missing.

The cluster requires a Deep Rekey operation to restore access to the encrypted disks.

The vCenter Server has not been restarted to refresh the encryption key cache.

The TPM on the host failed to unlock the data encryption keys.

NEW QUESTION 50
After a planned power outage, an administrator decided to restart the vSAN cluster manually.
Drag and drop the three correct options from the Options list on the left and place them into the Required Options on the right in any order. (Choose three.)

NEW QUESTION 51
A Compliance Auditor is reviewing the storage policy configurations for a new HCI Mesh environment.
A database team running VMs on the “Web-Client-Cluster” intends to provision their VMs onto the remote “DB-Server-Cluster” datastore. The “DB-Server-Cluster” is highly robust, utilizing 12 hosts and vSAN ESA.
The auditor extracts the storage policy assigned to these VMs:
“`
# SPBM Policy: “Mesh-DB-Policy”
[Policy Rules]
Site-Disaster-Tolerance: None – Standard Cluster
Failures-to-Tolerate: 2 failures – RAID-6 (Erasure Coding)
Encryption: Enabled
[Storage Compatibility]
Datastore: vsanDatastore-DB-Server
Host: Compliant
“`
Which TWO statements represent valid compliance checks and functional behaviors of this HCI Mesh configuration? (Choose 2.)

The storage policy must include a “Data Locality” rule to pin the VM execution to the Server cluster hosts to minimize network latency.

The RAID-6 erasure coding calculations for the database VMs will consume CPU cycles on the “Web- Client-Cluster” hosts, not the “DB-Server-Cluster” hosts.

Encryption is invalid in this topology; HCI Mesh cannot support Data-in-Transit encryption between Client and Server clusters.

The “Failures-to-Tolerate” rule validates against the host count of the “DB-Server-Cluster” (12 hosts), not the “Web-Client-Cluster”.

NEW QUESTION 52
A Solutions Architect is designing the upgrade and maintenance procedures for multiple vSAN Stretched Clusters in a VCF 9.0 environment. The organization is adopting the “Shared Witness” topology, where a single Witness Appliance provides quorum for up to 64 independent 2-Node clusters.
“`
[Storage Policy View – Shared Witness Cluster]
Shared Witness: ‘Witness-Central-01’
Supported Clusters: 64 (2-Node max)
Active Objects Monitored: 42,500
ESXi Version: 8.0 U2
“`
During the annual refresh cycle, this Shared Witness appliance must be replaced with a new virtual appliance configured with larger resource specifications.
Which of the following statements evaluate the trade-offs and operational impacts of replacing a Shared Witness? (Select all that apply.)

Replacing the Shared Witness creates a single point of operational risk; all 64 clusters will lose their tie-breaker vote simultaneously during the transition period.

The new Witness appliance can only be deployed on the exact same physical host as the old one to preserve the underlying MAC addresses required for the CMMDS heartbeats.

The architect must coordinate the replacement to ensure NO physical site failures or network partitions occur on ANY of the 64 clusters during the transition window.

The “Change Witness” workflow must be executed 64 times (once per cluster) to sequentially bind each cluster to the new Shared Witness appliance.

The Shared Witness model eliminates the need for individual cluster upgrades, as the central appliance automatically updates the ESXi versions of the 2-Node data hosts.

NEW QUESTION 53
A Cloud Administrator is integrating a third-party Backup solution with a vVols-backed VCF cluster. The goal is to perform crash-consistent backups with minimal stun time for the production VMs. The storage team created an advanced array-side feature definition that is pushed to vCenter via the VASA Provider.
“`
# SPBM Policy: “vVol-Backup-Optimized”
capabilities:
vvol:
array.snapshots: true
array.fast_clone: true
ruleSet:
IOPS_Limit: 50000
“`
How do vVols, VASA, and SPBM integrate to fulfill this backup requirement during the daily backup window? (Select all that apply.)

The array.fast_clone capability allows the backup software to export the vVol data directly over the management network without mounting it to an ESXi host.

When the backup software triggers a snapshot, vCenter uses VASA to instruct the physical array to create a hardware snapshot of the specific vVol, bypassing the ESXi storage stack entirely.

The integration practically eliminates the “VM stun” period that occurs during snapshot consolidation in traditional VMFS datastores.

Because vVols represent individual VMDKs on the array, the array can snapshot just the single VM’s data, unlike VMFS where array snapshots must capture the entire 10 TB LUN containing dozens of VMs.

NEW QUESTION 54
A Storage Administrator uses the Ruby vSphere Console (RVC) to diagnose a massive host isolation event in a vSAN ESA cluster.
“`
[RVC Output: vsan.cluster_info ~cluster]
Host: esx-04
Network Status: Partitioned (Isolated)
CMMDS Master: Self (Partition Group size: 1)
“`
esx-04 has completely lost vSAN network connectivity (an effective internal APD for its remote replicas).
How do the vSphere HA “Host Isolation Response” and the vSAN “Inaccessible Object” mechanics fuse to handle the Virtual Machines currently running on the isolated host esx-04?
(Select all that apply.)

esx-04 is isolated. It cannot see the rest of the cluster (no quorum). The vSAN DOM on esx-04 immediately marks all VM storage objects as “Inaccessible”, freezing the VMs to prevent split- brain.

RVC automatically generates a PDL condition on the remaining hosts to wipe the duplicate data.

esx-04 continues to run the VMs normally using only local storage cache, entering a “degraded active” mode.

The surviving cluster (which has the CMMDS Master and Quorum) detects that esx-04 is dead, and the vSphere HA Master on the surviving side initiates the boot-up sequence to restart the VMs.

If vSphere HA “Host Isolation Response” is set to “Power Off and Restart VMs”, esx-04 will forcibly terminate its local frozen VMs.

NEW QUESTION 55
An Infrastructure Manager is executing a massive workload migration inside a VCF Workload Domain. The goal is to Storage vMotion 50 Virtual Machines from the Principal “vSAN ESA” datastore to a new Supplemental “VMFS-6 Fibre Channel” datastore to free up high-performance NVMe capacity. What fundamental transformations occur to the Virtual Machine data structures and policies during this storage migration? (Select all that apply.)

The Virtual Machine will continue to utilize vSAN Native Snapshots because the ESXi host retains the ESA log-structured indexing in RAM.

Migrating the data off vSAN relieves the “Host Rebuild Reserve” threshold, immediately freeing up slack space on the hyper-converged nodes.

The vSAN SPBM availability rules (like FTT=1 Mirroring) are immediately stripped from the VM; redundancy is now handled entirely by the physical RAID hardware inside the external Fibre Channel array.

The vSAN Object/Component architecture (e.g., separate DOM components for namespace, swap, and VMDK) is dismantled; the data is consolidated into traditional flat files (VMDK, VMX) standard to the VMFS filesystem.

The VMFS-6 datastore will automatically apply a 1.25x RAID-6 capacity multiplier to simulate the previous vSAN state.

NEW QUESTION 56
Which statement accurately defines the architectural requirement for establishing trust between the vCenter Server and an external Key Management Server (KMS) to enable vSAN Data-at-Rest Encryption in VCF?

The ESXi hosts establish trust directly with the KMS using the vSphere TPM 2.0 module, completely bypassing vCenter Server.

The vCenter Server connects to the KMS via standard unencrypted HTTP, relying on the internal IPSEC network overlay for security.

Trust is established using a mutually authenticated SSL/TLS handshake based on the Key Management Interoperability Protocol (KMIP) standard; both the vCenter Server and the KMS must exchange and trust each other’s security certificates.

Trust is strictly established via a standard Active Directory Kerberos ticket; the vCenter and KMS must be joined to the same Windows domain.

NEW QUESTION 57
An Infrastructure Manager is analyzing the performance of a newly deployed vSAN ESA cluster using the vSAN Performance Service. The team has deployed highly transactional databases.
“`
[vSAN Performance View]
Component I/O Breakdown
DOM Client IOPS: 50,000
DOM Owner IOPS: 50,000
LSOM IOPS: 12,000
NVMe Device IOPS: 12,000
“`
The manager notices a massive discrepancy: The DOM layers are processing 50,000 IOPS, but the LSOM and physical NVMe devices are only processing 12,000 IOPS.
Which of the following architectural capabilities of the vSAN ESA log-structured filesystem explain this specific discrepancy? (Select all that apply.)

The discrepancy indicates a critical caching failure where 38,000 IOPS are being dropped by the DOM network layer before reaching the destination host.

The LSOM utilizes a high-performance log-structured mechanism that coalesces (groups) thousands of small random DOM I/O requests into a single large, sequential I/O write to the NVMe device.

The DOM Client uses the host CPU to compress 4KB blocks into 1KB blocks, meaning the LSOM receives fewer physical bytes to write, though the IOPS count typically reflects distinct operations rather than byte count.

The ESA architecture eliminates read-modify-write penalties for RAID-5/6, allowing the LSOM to write data natively without the traditional backend I/O amplification seen in OSA.

NEW QUESTION 58
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”?

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.

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.

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.

The “Preferred” site tag enables the log-structured filesystem; the Secondary site is forced to run standard block mode until a failover occurs.

NEW QUESTION 59
A CTO is reviewing the vSAN Performance View for a newly commissioned VCF Workload Domain.
Several mission-critical SQL servers are reporting sluggish query performance during peak business hours.
“`
[vSAN Performance View – Cluster Overview]
Virtual Machine Metrics (Frontend)
Read Latency: 2.1 ms
Write Latency: 35.4 ms (High)
vSAN Backend Metrics
IOPS: 45,000
Read Latency: 1.8 ms
Write Latency: 2.5 ms
Congestion: 0
“`
Based on the provided dashboard data, which component in the infrastructure is most likely responsible for the performance bottleneck?

The physical top-of-rack (ToR) switches providing the vSAN VMkernel network connectivity.

The vSAN write buffer capacity tier, which has become fully saturated.

The physical NVMe storage devices installed in the vSAN ReadyNodes.

The VMware Aria Operations for Logs instance, which is consuming excessive CPU cycles on the host.

NEW QUESTION 60
A VI Admin is attempting to mount a remote vSAN Datastore (Server Cluster) to a compute-only vSphere cluster (Client Cluster) to utilize the HCI Mesh capability.
“`
[vSAN Cluster Network Configuration – Client Cluster]
Host: esx-comp-01
vmk0: Management (192.168.1.10)
vmk1: vMotion (192.168.2.10)
vmk3: Fault Tolerance (192.168.3.10)
“`
The UI wizard to mount the remote vSAN datastore to the Client Cluster fails validation with a
“Network Prerequisites Unmet” error.
What is strictly required on the Client Cluster ESXi hosts to successfully mount and consume the remote HCI Mesh datastore?

The Client hosts must have a VMkernel adapter configured with the “vSAN” traffic type to establish the RPC connections to the Server cluster, even though the Client has no local vSAN storage.

The VI Admin must assign a vSAN license to the Client cluster before the network handshake will initiate.

The Client hosts must have an active Fibre Channel HBA zoned to the Server hosts.

The Client hosts must have the iSCSI software adapter enabled with the Server cluster’s VMkernel IPs listed as dynamic targets.

NEW QUESTION 61
A Compliance Auditor is reviewing the encryption and data-efficiency settings of a large VCF 9.0 environment. The environment contains a legacy VI Workload Domain running vSAN OSA, configured with strict data security and capacity optimization.
“`
[Storage Policy View]
vSAN Cluster: Legacy-OSA-01
Data-at-Rest Encryption: Enabled (KMS Validated)
Deduplication and Compression: Enabled (All-Flash)
“`
End users are complaining that application response times are sluggish during daily data ingestion windows, and vCenter alarms show ESXi CPU utilization at >95%.
How do the advanced data services in the OSA architecture contribute directly to this CPU saturation and resulting DOM congestion? (Select all that apply.)

In OSA, data must be compressed, deduped, and encrypted synchronously in the data path.
Ingesting new data requires the CPU to execute SHA-1 hashing against the massive in-memory hash tables to find duplicates, consuming extreme amounts of CPU cycles.

The integration of Deduplication and Encryption is natively incompatible in OSA; the hypervisor must decrypt the data first, dedup it, and then re-encrypt it, causing a double-tax on the CPU.

Disabling Deduplication and Compression on this specific cluster would immediately relieve the CPU bottleneck, allowing the data to stream to the NVMe drives as raw blocks.

Deduplication hash tables are offloaded to the physical Top-of-Rack switches in VCF, meaning the ESXi CPU is a false indicator of the storage bottleneck.

If the CPU is pegged at 100% processing the Dedup hashes, the storage subsystem slows down, triggering DOM client congestion and causing the VM latency the end users are experiencing.

NEW QUESTION 62
A SOC Analyst is auditing the physical storage metrics in vCenter for anomalies. The analyst notices that “Witness Components” are consuming bandwidth on the cluster network but consume less than 0.001% of the NVMe drive space.
“`
[vSAN Performance View > Component Breakdown]
Object: File-Server-VMDK
Component 1 (Data): 500 GB
Component 2 (Data): 500 GB
Component 3 (Witness): 4 MB
“`
Why does the vSAN Distributed Object Manager (DOM) actively generate and manage these 4 MB Witness components, and what rules govern their placement? (Select all that apply.)

Witness components contain zero virtual machine payload data; they consist purely of 4 MB of metadata used to track the latest Configuration Sequence Number (CSN) of the object.

Witness components are only generated in Stretched Cluster topologies; standard clusters do not require tie-breakers.

The 4 MB capacity indicates standard LZ4 compression; if the VM experiences heavy write I/O, the Witness component will grow to equal the size of the data components (500 GB).

A Witness component must NEVER be placed in the same physical fault domain as the Data components it is voting on; doing so would create a single point of failure that destroys quorum.

Witness components are automatically spawned by the CLOM whenever the number of Data components results in an “even” number of votes (e.g., FTT=1 Mirroring has 2 data copies). The Witness provides the 3rd vote to ensure a >50% majority can be calculated.