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Exam 3V0-21.21 All Questions

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Exam 3V0-21.21 topic 1 question 84 discussion

Actual exam question from VMware's 3V0-21.21
Question #: 84
Topic #: 1
[All 3V0-21.21 Questions]

An architect is tasked with designing a new VMware software-defined data center (SDDC) using VMware vSAN. The architect uses a storage assessment tool to determine the storage requirements for the new vSAN cluster. The new SDDC is going to be deployed into the existing data center and must be connected to a shared core network switch.
The architect decides to use vSAN ReadyNodes with the following configuration:
✑ Two disk groups with:
- Write Intensive NVMe 800 GB drive for cache
- Four 3.84 TB Mixed Use NVMe for capacity
✑ Four 10 GbE ports
Which element represents a risk that should be included in this design?

  • A. The number of 10 GbE capable ports in the vSAN ReadyNode
  • B. The use of vSAN ReadyNodes
  • C. The existing network is 10 GbE capable
  • D. The use of NVMe drives for cache and capacity
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by nemisis95 at June 14, 2021, 10:26 a.m.

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nemisis95
Highly Voted 3 years, 3 months ago
C. The existing network is 10 GbE capable
upvoted 20 times
guruto355
2 years, 8 months ago
10G NIC is poor for vSAN network. is it right?
upvoted 1 times
dikboy
2 years, 5 months ago
Hybrid VSAN = 1 GB NIC All-Flash VSAN = 10 GB NIC
upvoted 2 times
bulijojo
1 year ago
"B"(Byte)??Is it not "b"(bit)?
upvoted 1 times
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FR_Wolfman
Most Recent 7 months, 4 weeks ago
Selected Answer: C
Answer C is the correct one : Full-flash vSAN need 10 Gb network A >> A single port is sufficient to use vSAN. We need at least 2 to avoid SPOF. So having 4 ports is of course a risk at all. B >> There is no risk to use vSAN ReadyNodes. It is even better D >> No problem in using NVMe drives.
upvoted 1 times
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andr3
1 year, 2 months ago
Selected Answer: C
must be C, we assume its 10G network, nothing mentioned
upvoted 1 times
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sidious_aws
2 years ago
Selected Answer: C
I would vote for C, because it doesn't mention if the existing network is 10GbE ready. So the assumption and the risk to be included would be to ensure the existing network is 10GbE ready.
upvoted 4 times
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bpexam
2 years, 1 month ago
Selected Answer: C
I would opt for C
upvoted 2 times
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c11
2 years, 4 months ago
Can C not be an 'assumption'?
upvoted 2 times
zqd
1 year, 10 months ago
Yes, but full flash vsan need 10gbe. So if it's assumption, it's also a risk.
upvoted 2 times
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mvojka1990
2 years, 4 months ago
Sharing existing Core switches that handle other extra traffic on the datacenter, it might be a gap as the vSAN Confirguration is equipted with all NVMe for cache and capacity and the data throughput is around Gigabytes per second, existing network will be bottleneck on the total throughput of the swithces itlselves. C
upvoted 1 times
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UzairQureshi
2 years, 7 months ago
Selected Answer: D
Must be D As per below link, Dedicated or shared 10 Gbps for all-flash configurations. In question, it is mentioned NVME is used for cache and mixed NVME is used for Data so 10 GB network will be more then enough as configuration is hybrid https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-planning.doc/GUID-AFF133BC-F4B6-4753-815F-20D3D752D898.html
upvoted 3 times
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UzairQureshi
2 years, 7 months ago
Must be D As per below link, Dedicated or shared 10 Gbps for all-flash configurations. In question, it is mentioned NVME is used for cache and mixed NVME is used for Data so 10 GB network will be more then enough as configuration is hybrid https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-planning.doc/GUID-AFF133BC-F4B6-4753-815F-20D3D752D898.html
upvoted 1 times
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bigbigguy
2 years, 10 months ago
Should be D cache capacity ratio exceed 10%
upvoted 1 times
Aolivera
2 years, 8 months ago
Vsan all flash has no ratio it depends on workload https://blogs.vmware.com/virtualblocks/2018/08/23/extending-all-flash-vsan-cache-tier-sizing-requirement-for-different-endurance-level-flash-device/
upvoted 2 times
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cloud29
2 years, 11 months ago
Why C is the correct answer ?
upvoted 2 times
Raouleke
2 years, 10 months ago
Because its a shared network so its a risk. Also because none of the other are valid
upvoted 3 times
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Helpinghanditexams
3 years ago
Correct Answer : C
upvoted 1 times
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MosabSh
3 years ago
why the answer is C ? is it because it's not a fiber connection ?
upvoted 1 times
mvojka1990
2 years, 4 months ago
there is no FC on vSAN architecture
upvoted 1 times
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A (35%)
C (25%)
B (20%)
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