Free Access VMware.3V0-23.25.v2026-09-17.q73 Practice Test (Page 5)

Question 16

A Virtual Infrastructure (VI) Admin is investigating chronic congestion alerts on a VCF 9.0 vSAN Cluster. The storage hardware consists of high-end NVMe drives which are only at 30% utilization, yet the vSAN Performance Service shows significant "Network Congestion".
The network architecture is configured as follows:
- 2x 25 Gbps physical NICs per host.
- vSAN traffic and vMotion traffic share the same Distributed Port Group.
- Network I/O Control (NIOC) is enabled.
- Jumbo Frames (MTU 9000) are configured on the vSphere Distributed Switch (vDS) but MTU 1500 is configured on the physical ToR switches.
The admin suspects that network misconfigurations are propagating faults into the storage stack.
Which of the following interactions explain how the current network design is causing the storage backend latency and congestion? (Select all that apply.)

A.The MTU mismatch between the vDS (9000) and ToR switches (1500) causes silent packet drops for large vSAN I/O payloads, forcing TCP retransmissions that vSAN interprets as storage latency.

B.The 25 Gbps NICs are fundamentally insufficient for vSAN ESA requirements; VCF 9.0 strictly requires 100 Gbps RDMA networking for NVMe performance.

C.Sharing vSAN and vMotion traffic without appropriate NIOC shares allows large vMotion migrations to starve the vSAN network stack, triggering log-congestion on the storage devices.

D.The Network Congestion metric specifically indicates that the vSAN Distributed Object Manager (DOM) is delaying host-to-host replication traffic to match the limited throughput of the physical switch buffers.

Question 17

A CTO is evaluating how to handle Site Maintenance and Site Failover testing for a VCF Stretched Cluster. The infrastructure team prefers using vSphere Distributed Resource Scheduler (DRS) Host/Site Affinity rules to automate VM movements, rather than using SRM.
The CTO examines the architectural trade-offs of relying purely on DRS rules versus an SRM Recovery Plan.
Which of the following statements accurately describe the trade-offs and mechanics of using DRS Affinity Rules for Site Failover in a Stretched Cluster? (Select all that apply.)

A.DRS site affinity rules automatically override the vSAN "Site Locality" algorithm, forcing data components to migrate to the same site as the compute.

B."Should run on Preferred Site" affinity rules allow VMs to be easily vMotioned to the Secondary Site for maintenance, and vSphere HA will still restart them on the Secondary Site during a real disaster.

C.SRM testing requires pausing the vSAN synchronous mirror, whereas DRS-based testing allows VMs to move freely between sites without breaking RPO.

D.A primary limitation of DRS-based failover is that it cannot control the startup order (IP address updates, dependencies) of virtual machines after they restart on the remote site.

E."Must run on Preferred Site" affinity rules are an anti-pattern for DR; if the Preferred Site fails, vSphere HA is strictly forbidden from restarting these VMs on the Secondary Site, negating the disaster recovery value.

Question 18

An Operations Engineer is evaluating a VCF architecture that combines vSAN HCI Mesh with a multi- site network topology.
```
[Configuration Context]
* Cluster-A (Server) is in Data Center 1.
* Cluster-B (Client) is in Data Center 2.
* The inter-datacenter link is 10 Gbps with 5ms RTT.
```
The engineer intends to mount Cluster-A's vSAN datastore to Cluster-B to run low-priority archive VMs.
What are the critical architectural limitations and trade-offs that the engineer must accept in this specific cross-site HCI Mesh design? (Select all that apply.)

A.If the inter-datacenter link fails, the VMs running on Cluster-B will immediately experience an APD (All Paths Down) condition and freeze.

B.The 10 Gbps link violates the minimum 25 Gbps requirement for vSAN ESA, meaning Cluster-A must be configured as vSAN OSA to support this topology.

C.HCI Mesh generates substantial synchronous I/O across the network; a 5ms RTT link will significantly increase the frontend latency for VMs running on Cluster-B.

D.Enabling vSAN Data-in-Transit Encryption will further exacerbate the CPU overhead and latency on the 5ms RTT inter-datacenter link.

E.VCF explicitly prohibits mounting remote vSAN datastores across different vCenter Server instances (Cross-vCenter HCI Mesh is unsupported).

Question 19

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.)

A.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.

B.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.

C.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.

D.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.

E.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.

Question 20

An Infrastructure Manager is presenting the 5-year Total Cost of Ownership (TCO) analysis for a new VCF Workload Domain. The comparison pits a vSAN ESA HCI cluster against a traditional SAN array.
```
[SDDC Manager - Capacity & Scale Comparison]
HCI Topology: 16 Hosts (100% compute/storage utilized)
SAN Topology: 16 Hosts + 1 SAN Array (Storage 100% utilized, Compute
60% utilized)
```
The business demands an additional 50 TB of storage capacity, but requires ZERO additional compute resources (vCPU/RAM).
Which TWO statements accurately describe the TCO limitations and operational realities for fulfilling this specific expansion requirement in both architectures? (Choose 2.)

A.VCF explicitly prohibits asymmetrical scaling (adding drives to existing hosts) in HCI environments to prevent compute contention, forcing the purchase of new ReadyNodes.

B.The traditional SAN architecture excels in this scenario, as the manager can simply purchase a DAE (Disk Array Enclosure) with 50 TB of disks without incurring any vSphere compute licensing costs.

C.The traditional SAN architecture completely fails this requirement because external arrays cannot be expanded without adding ESXi host initiators to the fabric.

D.Scaling HCI can be economically inefficient in this scenario; adding "compute-heavy" vSAN ReadyNodes just for their drive bays forces the business to pay for unnecessary CPU, RAM, and vSphere host licenses.

E.vSAN ESA addresses this traditional HCI limitation by automatically offloading the new storage capacity to the physical SAN array through the VASA API.

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