Practice Free 3V0-23.25 Exam Online Questions
A Network Administrator is securing the physical connections for the VCF out-of-band management network.
The administrator notes that the vSAN Skyline Health dashboard is reporting a warning: vCenter and KMS communication link is unencrypted.
[Log Analysis: vpxd.log]
2026-11-20T09:10:00Z WARN vpxd – [KMIP] KMS Provider ‘Vault-01’ using HTTP proxy.
2026-11-20T09:10:01Z ERROR vpxd – [KMIP] TLS handshake bypassed.
How does the vSphere Native Key Provider (NKP) introduced in recent vSphere versions solve this specific network boundary complexity compared to the legacy External KMS model? (Select all that apply.)
- A . Native Key Provider operates entirely within the vCenter Server cluster, removing the dependency on external network firewalls and eliminating the need for complex external KMIP server certificates.
- B . Native Key Provider uses the vSAN storage network (MTU 9000) to distribute keys instead of the management network, ensuring the link is always encrypted.
- C . NKP is strictly for VM-level encryption and cannot be used to encrypt the vSAN datastore storage pool.
- D . With NKP, the vCenter Server itself becomes the Key Server, generating and distributing the keys internally, which significantly simplifies the VCF deployment topology.
- E . If the vCenter Server running NKP crashes, the ESXi hosts can automatically generate their own KEKs.
A Compliance Auditor is reviewing the security posture of an external NAS cluster integrated into a VCF environment for cheap, massive capacity. The NAS is connected using the NFS v3 protocol.
The auditor observes the YAML configuration for the datastore connection defined by the DevOps team:
# Datastore Definition
kind: Datastore
metadata:
name: archive-nas-01
spec:
type: NFS
remoteHost: 10.10.10.50
remotePath: /export/audit_logs
security:
secType: sys
# Kerberos: Disabled
Which TWO security limitations or vulnerabilities are inherently introduced by using NFS v3 for this external capacity compared to native vSAN? (Choose 2.)
- A . NFS requires enabling Promiscuous Mode on the NSX Distributed Virtual Switch, creating a network security vulnerability.
- B . The external NAS disables vSphere High Availability (HA) on the cluster, meaning a host failure will leave data permanently locked.
- C . All data traversing the network between the ESXi hosts and the NFS array is transmitted in unencrypted cleartext.
- D . NFS v3 (secType: sys) relies entirely on the client IP address for authentication, meaning a rogue server spoofing the ESXi host’s IP on that subnet could mount the share and read the audit logs.
- E . NFS v3 utilizes VMFS-6 distributed locking, which forces the ESXi hypervisor kernel to expose root certificates to the external NAS.
A Compliance Auditor is tracking the success of an automated "Shallow Rekey" task scheduled across a massive VCF 9.0 multi-cluster environment. The task failed on a specific vSAN Stretched Cluster.
[Skyline Health > vSAN > Encryption Health]
Status: Warning
Message: "KMS Server unreachable on Host esx-04. Rekey Aborted."
[Architecture Details]
esx-04 is part of the Secondary Site. The Inter-Site Link is currently DOWN (Partition).
How does the vSAN encryption architecture prevent data loss and split-brain when a Rekey operation hits a partitioned cluster? (Choose 2.)
- A . esx-04 will instantly cryptographically shred its local drives to prevent data compromise during the network partition.
- B . Even though the Rekey failed, the virtual machines on the surviving site remain fully operational because the ESXi hosts maintain the *current* KEK cached in their secure RAM, requiring no active KMS connection to serve I/O.
- C . esx-04 will automatically fallback to the local Witness appliance to generate a temporary KEK until the network is restored.
- D . The DOM Client forces esx-04 to perform a Deep Rekey using the vSphere TPM chip to bypass the KMS outage.
- E . The Shallow Rekey operation is strictly an atomic transaction; if esx-04 cannot reach the KMS to receive the new Key Encryption Key (KEK), the vCenter master node rolls back the KEK on all other hosts to ensure cluster-wide key consistency.
A VCF Architect is calculating the performance TCO (Cost per IOPS) difference between upgrading a legacy SAN environment and deploying a new vSAN ESA HCI Cluster.
The architect examines the log output during a simulated application stress test that saturated the backend capabilities of both topologies.
[Log Analysis: vpxd.log – Congestion Events]
# Traditional SAN Cluster
2026-12-01T10:00:15Z WARN vpxd – [Storage] Datastore ‘SAN-Tier1’ queue depth 64/64 full. Host I/O delayed.
# vSAN ESA Cluster
2026-12-01T10:15:22Z WARN vpxd – [vSAN] Component congestion on ESXi-08. vSAN DOM applying localized backpressure.
2026-12-01T10:15:23Z INFO vpxd – [vSAN] DRS migrating VM ‘App-DB’ to ESXi-02 to access uncongested storage path.
How does the HCI Operational Model provide a TCO and performance advantage for handling extreme utilization peaks, as demonstrated in this log? (Select all that apply.)
- A . Traditional SANs cannot use vMotion to resolve storage congestion because the storage bottleneck is centralized at the array level, impacting all hosts connected to that LUN.
- B . The ESA log output indicates a failure of the Deduplication engine, which forces the system to buy additional software licenses to process the I/O.
- C . In a 3-tier SAN, the LUN queue is a rigid choke point; scaling performance requires physically upgrading the SAN controllers. In HCI, the queue is distributed across all NVMe drives on all hosts, naturally providing massively higher aggregate queues.
- D . HCI allows performance troubleshooting to leverage standard compute resources. If an HCI host is congested, vSphere DRS can simply vMotion the VM to another host with available storage and compute cycles.
- E . The operational cost of expanding the "queue depth" in HCI is effectively zero because it scales automatically as physical hosts and NVMe drives are added to the environment.
Which statement correctly describes the architectural mechanism that vSAN utilizes when a Witness Appliance is permanently replaced in a Stretched Cluster?
- A . The new Witness Appliance automatically pulls a mirrored copy of all virtual machine data blocks from the Preferred site to establish its baseline.
- B . vSAN requires the entire cluster to enter a read-only state during the replacement process to prevent split-brain conditions while the new Witness initializes.
- C . The Distributed Object Manager (DOM) performs a metadata-only resync to the new Witness host, updating the component voting tables without migrating actual VM data.
- D . The replacement process triggers a full vSphere HA failover of all virtual machines to the Secondary site to ensure data consistency.
An Infrastructure Manager is preparing a VCF 9.0 Workload Domain for a major lifecycle upgrade via SDDC Manager. Before allowing the update to proceed, the manager runs the vSAN Health Check.
A critical failure is flagged regarding the I/O Controller firmware.
The manager reviews the vpxd.log to investigate the interaction between the health check and the hardware state:
2026-11-20T10:05:12Z INFO vpxd – [vSAN Health] Running check: "Controller Firmware is VMware Certified"
2026-11-20T10:05:15Z WARN vpxd – Host esx-05.corp.local: Controller "LSI MegaRAID 3508" running Firmware "24.21.0-0019".
2026-11-20T10:05:15Z WARN vpxd – HCL Database (Version: 104) requires Firmware "24.21.0-0148" for vSAN 8.0 ESA.
2026-11-20T10:05:16Z ERROR vpxd – [vSAN Health] Check "Controller Firmware" FAILED.
What is the correct sequence of logic and architectural principles the manager must understand to resolve this Deep Fusion scenario involving Health Checks and HCL updates? (Select all that apply.)
- A . The health check can be bypassed by acknowledging the alarm in vCenter, allowing the SDDC Manager update to force-flash the firmware during the upgrade process.
- B . vSAN ESA eliminates the need for I/O controller compliance checks because NVMe devices attach directly to the PCIe bus without a controller.
- C . Updating the vSAN HCL JSON database to the latest version might resolve the alert if VMware has recently certified the older firmware (24.21.0-0019) for the target vSAN version.
- D . The health check failure is a hard blocker for VCF upgrades; SDDC Manager will refuse to upgrade the vSphere layer if the vSAN underlying hardware is non-compliant with the target version.
- E . If the HCL database is already current, the manager must use vSphere Lifecycle Manager (vLCM) to actively patch the physical controller firmware to the required version ("0148") before proceeding.
A Compliance Auditor is investigating a VCF 9.0 Stretched Cluster failover event. The cluster uses vSAN Data-at-Rest Encryption (D@RE) tied to an external Key Management Server (KMS) cluster.
[Log Snippet: vpxd.log – Site A Failure]
2026-11-20T10:00:00Z FATAL hostd [Site A] – Power lost.
2026-11-20T10:00:05Z INFO vpxd – Quorum maintained via Witness + Site B.
2026-11-20T10:00:10Z INFO vpxd – Initiating HA Restart on Site B hosts.
2026-11-20T10:00:15Z WARN vpxd – KMS Server ‘KMS-SiteA-01’ unreachable.
How do the deep architectural dependencies between vSAN Encryption, vSphere HA, and KMS topology ensure the encrypted VMs successfully restart on Site B despite the loss of the Site A KMS? (Select all that apply.)
- A . VCF automatically replicates the cleartext encryption keys across the vSAN Inter-Site Link to prevent lockouts.
- B . If the Site B ESXi hosts were cold-rebooted during the power outage, they would require active communication with the surviving KMS to mount the vSAN datastore.
- C . vSAN maintains standard storage accessibility because the ESXi hosts on Site B hold the KEKs in their local secure memory cache; they do not need to query the KMS to continue standard I/O during a failover.
- D . Site B hosts must independently retrieve the Key Encryption Key (KEK) from the surviving KMS instance in the KMS cluster (KMS-SiteB-02) to unwrap the local Disk Encryption Keys (DEKs).
- E . The Witness Appliance automatically functions as a backup Key Provider when the primary KMS server fails.
A VCF Architect is using the SDDC Manager API to deploy a massive "Shared Witness" topology. The goal is to support 40 independent 2-Node vSAN ROBO clusters using a single, large Witness Appliance located in the Management Domain.
# SDDC Manager API Specification
{
"witnessSpec": {
"hostname":
"Shared-Witness-01",
"size":
"Extra-Large",
"max_components": 60000
},
"targetClusters": [
"ROBO-01", "ROBO-02", … "ROBO-40" ]
}
Which of the following statements accurately describe the architectural constraints and capabilities of the VCF Shared Witness feature? (Select all that apply.)
- A . All 40 ROBO clusters mapped to the Shared Witness must be running the exact same vSAN Architecture (either all OSA or all ESA) and identical ESXi versions to maintain CMMDS compatibility.
- B . Shared Witness is strictly supported for standard 2-Node ROBO configurations; it cannot be used to consolidate witnesses for full 3+3 node Stretched Clusters.
- C . A single "Extra-Large" Shared Witness appliance can support up to 64 distinct 2-Node clusters, consolidating up to 64,000 metadata components into one VM.
- D . If the single Shared Witness appliance crashes, all 40 ROBO clusters will immediately suffer a datastore lockout and the edge VMs will become Inaccessible.
- E . Shared Witness requires SDDC Manager to deploy the appliance directly onto AWS EC2 instances, as on-premises VCF datastores cannot support the combined IOPS load.
An Operations Engineer executes a Python script to enable Data-in-Transit (DiT) Encryption across a massive 32-node VCF cluster via the vCenter API.
# SDDC Manager API Payload (JSON)
{
"cluster_id":
"domain-c45",
"data_in_transit_encryption_enabled": true,
"rekey_interval": 1440
}
How does the vSAN architecture physically process the massive CPU overhead required to encrypt this 100 GbE East-West storage network traffic, ensuring VMs do not experience high latency?
- A . The encryption is offloaded strictly to the physical SmartNICs (DPUs) using the vSphere Distributed Services Engine.
- B . It dynamically drops the MTU back to 1500 to reduce the cryptographic buffer requirement per frame.
- C . The vSAN network stack natively utilizes the AES-NI (Advanced Encryption Standard New Instructions) hardware acceleration embedded directly in standard Intel/AMD CPU silicon, processing the stream at the VMkernel layer prior to NIC transmission.
- D . The ESXi hypervisor routes the vSAN traffic through the NSX Edge gateway virtual machines to utilize their dedicated crypto-processors.
A VCF Deployment Specialist is trying to import a massive OVA template into a vSAN cluster that is running dangerously low on physical host resources.
The VM requires an FTT=1 (RAID-1) policy, but the cluster does not have enough hosts available to establish the required mirror. The specialist edits the storage policy to use "Force Provisioning".
[Storage Policy Rule View – Modified]
Policy:
Temp-Import-Policy
Failures to Tolerate: 1
(RAID-1)
Advanced
Rule:
Force
Provisioning: Enabled
How does CLOM alter its standard provisioning logic when the "Force Provisioning" rule is enabled, and what is the resulting anti-pattern? (Choose 2.)
- A . The object remains permanently non-compliant; CLOM will actively poll the cluster and automatically build the missing replica component as soon as resources become available.
- B . CLOM overrides the FTT requirement and provisions the object with ZERO redundancy (instantiating only one replica) to allow the VM to boot.
- C . The "Force Provisioning" flag forces CLOM to consume the protected "Host Rebuild Reserve" space, risking a datastore full condition.
- D . The feature compresses the data aggressively using the CPU to fit the object into the remaining available fault domains.
- E . CLOM changes the Object State to "Inaccessible" immediately after creation because it detects the missing mirror.