Free Access VMware.3V0-23.25.v2026-09-17.q73 Practice Test (Page 10)

Question 41

A VI Admin is planning the expansion of a 3-node vSAN cluster to a 6-node vSAN cluster. The 3- node cluster is currently operating near maximum safe capacity due to the strict "Host Rebuild Reserve" threshold.
```
[Log Snippet: vmkernel.log - Capacity Daemon]
2026-11-20T10:00:00Z WARN vsan-dom - Host Rebuild Reserve active: 33%
of Raw Capacity locked.
2026-11-20T12:00:00Z INFO vpxd - Cluster expansion complete. Host
count: 6.
2026-11-20T12:05:00Z INFO vsan-dom - Host Rebuild Reserve recalculated:
[ ? ]%
```
How does the physical expansion of the cluster mathematically alter the "Host Rebuild Reserve" percentage, and what is the direct impact on usable VM capacity?

A.The required reserve percentage automatically decreases from 33% down to approximately 16%; this releases a significant portion of previously "locked" storage on the original hosts back into the usable VM capacity pool.

B.The log indicates that Host Rebuild Reserve is disabled automatically upon reaching 6 nodes because Distributed Resource Scheduler (DRS) handles capacity allocation above the 4-node threshold.

C.The reserve percentage increases to 50% because a 6-node cluster inherently carries a higher statistical risk of dual-host failures.

D.The reserve percentage remains fixed at 33% to comply with the FTT=1 storage policy, meaning usable capacity scales linearly but overhead remains high.

Question 42

An Operations Engineer is attempting to expand a VCF 9.0 Workload Domain by adding a new ESXi host via the SDDC Manager UI.
```
[SDDC Manager - Pre-Check Validation]
Status: FAILED
Error Code: VSAN_HEALTH_CHECK_FAILED
Details: "Network Performance Proactive Test detected bandwidth below threshold."
[UI - SDDC Manager Capacity View]
Current Cluster: 3 Hosts (75% Consumed)
Target: Add esx-04
```
Why does SDDC Manager explicitly execute and mandate the "vSAN Network Performance Test" before allowing a new host to join the live cluster? (Choose 2.)

A.The Proactive Network test verifies that the new host's physical bandwidth can actually support the background resync (rebalance) that will immediately trigger when the 4th host is added to the 75% full cluster.

B.The test runs a physical memory scan on the new host to determine if it can run vCenter.

C.SDDC Manager treats vSAN as the core infrastructure backbone; adding a host with a degraded network link (e.g., faulty SFP negotiating at 1GbE instead of 25GbE) would destabilize the existing quorum.

D.The test injects multicast traffic to measure the switch buffer depth; if the switch drops packets, the host is deemed unsuitable for Stretched Clustering.

E.The test calculates the deduplication savings on the new host to ensure it matches the existing capacity.

Question 43

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 automatically fallback to the local Witness appliance to generate a temporary KEK until the network is restored.

B.The DOM Client forces esx-04 to perform a Deep Rekey using the vSphere TPM chip to bypass the KMS outage.

C.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.

D.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.

E.esx-04 will instantly cryptographically shred its local drives to prevent data compromise during the network partition.

Question 44

A Compliance Auditor is validating that a VCF Workload Domain meets the "Continuous Key Rotation" requirements of a strict financial standard (e.g., SOX/PCI).
The auditor examines the vCenter logs surrounding the Data-in-Transit (DiT) configuration.
```
[Log Analysis: vpxd.log]
2026-11-20T12:00:00Z INFO vpxd - [DiT] Rekey interval expired (1440
minutes).
2026-11-20T12:00:01Z INFO vpxd - [DiT] Ephemeral session keys
successfully renegotiated between [esx-03] and [esx-05].
2026-11-20T12:00:02Z INFO vpxd - [DiT] Old key buffer purged.
```
How does the DiT key rotation architecture satisfy compliance without relying on external KMS administrators? (Select all that apply.)

A.The ESXi hosts must temporarily pause cluster write operations (Congestion) for 30 seconds to synchronize the new symmetric keys.

B.Key rotation occurs instantly at the packet layer; the DOM Client creates a new key for every single 4KB block written.

C.DiT keys are automatically persisted to the vCenter database as backup material before deletion, ensuring forensic accountability.

D.The RekeyInterval can be aggressively modified via API (e.g., to 60 minutes) to meet stricter compliance rules, without causing any disruption to the active storage traffic.

E.The default "Rekey Interval" for DiT is 1440 minutes (24 hours). The ESXi hosts automatically perform a new Diffie-Hellman handshake every day to create a completely new session key, making brute-force decryption of historical traffic impossible.

Question 45

A VCF Deployment Specialist is investigating a localized physical drive failure in two separate VCF domains: Domain A (vSAN OSA with Dedupe Enabled) and Domain B (vSAN ESA). In both domains, a single 3.84 TB Capacity SSD/NVMe drive has suffered a "Permanent Device Loss" (PDL).
```
[RVC Output: vsan.disks_stats Domain A (OSA)]
Failed: naa.500A... (Capacity Tier)
[RVC Output: vsan.disks_stats Domain B (ESA)]
Failed: naa.500B... (Storage Pool)
```
Based on the architectural implementation of deduplication and the filesystem structure, which TWO statements accurately contrast the failure blast radius in these environments? (Choose 2.)

A.Both architectures experience the exact same failure domain (loss of 3.84 TB), as deduplication state is maintained independently inside the ESXi RAM.

B.In Domain A (OSA), the loss of a single capacity drive in a deduped disk group invalidates the entire deduplication hash table; vSAN must fail the ENTIRE disk group (including the cache and all other healthy capacity drives) and rebuild the data across the network.

C.Domain B (ESA) will suffer a total host failure because the Log-Structured filesystem cannot isolate single NVMe failures.

D.In Domain B (ESA), because Deduplication is eliminated and the Storage Pool is flat, the loss of the single NVMe drive ONLY affects the components physically stored on that specific drive; the other drives remain active.

E.Domain A (OSA) will rebuild faster because deduplication pointers are automatically remapped to the remaining capacity drives in the group without requiring network resynchronization.

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Question 41

Question 42

Question 43

Question 44

Question 45

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