5V0-21.21 Exam Questions and Answers

QUESTION: 6

An administrator wants to check the performance metrics for the workloads and their virtual disks that are running on a vSAN cluster, but no statistical charts are displayed in the vSphere client.
Why is this behavior being seen? Options:

vSAN network diagnostic mode is not enabled.
vSAN proactive tests haven't been run yet.
vSAN performance service is turned off.
vSAN performance verbose mode is not enabled.

Answer(s): C

Explanation:

Some tools allow for measuring latency peaks. This unfortunately isn't ideal, as it can unfairly represent statistical outliers, which may very well occur when there is little to no I/O activity. The best way to understand the actual behavior of VM and application latencies is to observe in time based performance graphs. Depending on the level of detail, you may need to measure at the individual VMDK level. Become familiar with these graphs to determine what is normal, and what is not for that given application. This is where you can use built-in functionality of vCenter and the vSAN performance service metrics to gather this information.

Reference:

https://core.vmware.com/resource/troubleshooting-vsan-performance#_Toc536646873

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QUESTION: 7

In a vSAN stretched cluster, which value must be set in the vSAN policy if there is no requirement for data mirroring across sites?
Options:

SFTT = 0
SFTT = 1
PFTT = 1
PFTT = 0

Answer(s): A

Reference:

https://www.delltechnologies.com/asset/en-us/products/converged-infrastructure/technical-support/h15275-vxrail-planning-guide-virtual-san-stretched-cluster.pdf (5)

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QUESTION: 8

After a vSAN Witness Appliance network configuration, the vSAN administrator notices that vSAN traffic flows from vmk0 (Management Traffic) rather than vmk1 (vSAN Traffic).
Which step should be taken to resolve this issue? Options:

Configure vmk0 with IP address on the same range as that of vmk1.
Tag the vmk0 for vSAN traffic.
Configure vmk1 with IP address on the different network than that of vmk0.
Tag the vmk1 for Witness traffic

Answer(s): C

Explanation:

Click on next and assign the IP address for the Witnesspg vmkernel interface. The vmk1 interface cannot be configured with an IP address on the same range as that of vmk0. This is because Management traffic and vSAN traffic use the default TCP/IP stack. If both vmk0 and vmk1 are configured on the same range, a multihoming condition will occur and vSAN traffic will flow from vmk0, rather than vmk1.

Reference:

http://www.vmwarearena.com/vsan-stretched-cluster-how-to-configure-vsan-witness-appliance/

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QUESTION: 9

During a maintenance action on a vSAN node, a vSAN administrator noticed that the default repair delay time is about to be reached.
Which two commands must be run to extend the time? (Choose two.) Options:

/etc/init.d/vsanmgmtd restart
esxcli system settings advanced set -o /VSAN/ClomRepairDelay -i 50
esxcli system settings advanced set -o /VSAN/ClomRepairDelay -i 80
/etc/init.d/clomd restart
/etc/init.d/vsanobserver restart

Answer(s): C,D

Reference:

https://kb.vmware.com/s/article/2075456

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QUESTION: 10

A company has engaged a consultant to upgrade an existing vSAN cluster to vSAN 7.0 U1. During the discovery phase, the consultant found the following information about the existing environment:

* The VMware vCenter Server has recently been upgraded from VMware vSphere 6.7 U3 to version 7.0 U1.
* The vSAN Cluster was recently expanded with identical hardware specification, but from a different hardware vendor.
* The hardware for each vSAN node is listed on the vSAN Compatibility Guide (VCG) for vSAN 7.
* The vSAN Cluster has the following configuration:
- vSAN version: 6.6.1
- Number of vSAN nodes: 10
- Encryption: enabled
- Deduplication and Compression: enabled
- vSAN Capacity Utilization: 60%
* Each vSAN node has the following configuration:
- VMware vSphere ESXi version: 6.5 Update 3
- CPU: 2 processors, 20 cores
- RAM: 768GB RAM.
- Disk: 2 Cache SSDs and 6 Capacity SSDs
- Network: 4 x 10GbE

Which three recommendations should the consultant make to ensure all data remains protected in the event of a vSAN failure? (Choose three.)
Options:

The Full data migration maintenance mode option must be chosen to protect the data during the upgrade.
The Ensure accessibility, migration maintenance mode option must be chosen to protect the data during the upgrade.
The upgrade process should be completed using host upgrade baselines in VMware vSphere Lifecycle Manager (vLCM).
The vSAN nodes should be upgraded to vSphere ESXi 7.0 U1.
The upgrade process should be completed using images in VMware vSphere Lifecycle Manager (vLCM).
The vSAN nodes should be upgraded to vSphere ESXi 6.7 U3.

Answer(s): B,D,E

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VMware 5V0-21.21 Exam (page: 2) VMware HCI Master Specialist Updated on: 25-Dec-2025

QUESTION: 6

Explanation:

Reference:

QUESTION: 7

Reference:

QUESTION: 8

Explanation:

Reference:

QUESTION: 9

Reference:

QUESTION: 10

VMware 5V0-21.21 Exam (page: 2)
VMware HCI Master Specialist
Updated on: 25-Dec-2025