VCP-DCV vSphere Architecture, Products and Solutions Practice Question
This VCP-DCV practice question tests your understanding of vsphere architecture, products and solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An administrator notices that a virtual machine on an NFS datastore is experiencing intermittent performance degradation. The ESXi hosts are connected to the NFS server via a 10 GbE network. The administrator uses esxtop and sees high average latency on the storage device, but the NFS server reports low latency. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Network congestion is causing TCP retransmissions
Option D is correct because NFS uses TCP/IP; if the network is congested or there is packet loss, the retransmissions cause increased latency seen by ESXi but not by the NFS server itself (the server sees requests and responses in its stack). Option A is incorrect because the NFS datastore is already mounted; connectivity is fine. Option B is incorrect because jumbo frames do not typically cause high latency; they might cause issues if misconfigured but not this specific symptom. Option C is incorrect because deduplication on the server side would not cause latency on ESXi side.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Jumbo frames are enabled on the ESXi hosts but not on the NFS server
Why it's wrong here
MTU mismatch can cause packet drops, but it would likely cause total connectivity issues, not intermittent performance.
✓
Network congestion is causing TCP retransmissions
Why this is correct
Network issues cause retransmissions increasing latency on the client side, while server reports low latency.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The NFS server is performing data deduplication on the datastore
Why it's wrong here
Deduplication is a storage feature that does not directly cause latency seen by ESXi.
✗
The NFS datastore is mounted with read-only permissions
Why it's wrong here
Read-only would cause write failures, not performance degradation.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the VCP-DCV exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which VCP-DCV exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
vSphere Architecture, Products and Solutions — This question tests vSphere Architecture, Products and Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Network congestion is causing TCP retransmissions — Option D is correct because NFS uses TCP/IP; if the network is congested or there is packet loss, the retransmissions cause increased latency seen by ESXi but not by the NFS server itself (the server sees requests and responses in its stack). Option A is incorrect because the NFS datastore is already mounted; connectivity is fine. Option B is incorrect because jumbo frames do not typically cause high latency; they might cause issues if misconfigured but not this specific symptom. Option C is incorrect because deduplication on the server side would not cause latency on ESXi side.
What should I do if I get this VCP-DCV question wrong?
Identify which VCP-DCV exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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