Question 329 of 521

vSphere Architecture, Products and Solutions →hardMultiple ChoiceObjective-mapped

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 is troubleshooting a VM that is experiencing high latency on its virtual disks. The VM is connected to a vSphere datastore backed by an NFS share. The ESXi host has multiple VMkernel ports configured for NFS traffic. Which configuration change is most likely to improve storage performance?

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.

A
Configure multiple VMkernel ports for NFS and enable port binding with a route based on originating port ID policy.
This leverages multiple network paths to improve performance and redundancy.
B
Use a single VMkernel port for NFS and configure it with the highest priority.
Why wrong: Single port can become a bottleneck; multiple ports with load balancing are better.
C
Enable jumbo frames on the NFS VMkernel port and the physical switches.
Why wrong: Jumbo frames can improve performance but require end-to-end support and may not resolve latency issues.
D
Increase the disk queue depth on the VM's virtual SCSI controller.
Why wrong: This might increase throughput but does not address network latency.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Configure multiple VMkernel ports for NFS and enable port binding with a route based on originating port ID policy.

Option A is correct because NFS port binding (also known as NFS multipathing) allows multiple VMkernel ports to be used for NFS traffic, and when combined with a 'route based on originating port ID' load-balancing policy, it enables the ESXi host to distribute NFS I/O across multiple physical NICs and paths. This increases aggregate throughput and reduces latency by avoiding congestion on a single VMkernel port or physical link, which is the most effective change for improving storage performance in this scenario.

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.

✓
Configure multiple VMkernel ports for NFS and enable port binding with a route based on originating port ID policy.
Why this is correct
This leverages multiple network paths to improve performance and redundancy.
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.
✗
Use a single VMkernel port for NFS and configure it with the highest priority.
Why it's wrong here
Single port can become a bottleneck; multiple ports with load balancing are better.
✗
Enable jumbo frames on the NFS VMkernel port and the physical switches.
Why it's wrong here
Jumbo frames can improve performance but require end-to-end support and may not resolve latency issues.
✗
Increase the disk queue depth on the VM's virtual SCSI controller.
Why it's wrong here
This might increase throughput but does not address network latency.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often assume jumbo frames (Option C) are the universal fix for storage latency, but they overlook that NFS port binding directly addresses the root cause of network congestion by enabling multipathing, which is the specific technology tested in this VCP-DCV domain.

Detailed technical explanation

How to think about this question

NFS port binding works by creating multiple VMkernel ports on the same subnet and binding them to the same NFS mount, allowing the ESXi host to use multiple TCP connections to the NFS server. The 'route based on originating port ID' policy uses the source VMkernel port's identifier to select the physical NIC, ensuring that each NFS session is pinned to a specific path, which avoids packet reordering and maintains session integrity. In real-world deployments, this is critical for NFSv3, which lacks native multipathing, and requires careful alignment with the NFS server's network configuration to avoid asymmetric routing.

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.

TExam Day Tips

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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this VCP-DCV question test?

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: Configure multiple VMkernel ports for NFS and enable port binding with a route based on originating port ID policy. — Option A is correct because NFS port binding (also known as NFS multipathing) allows multiple VMkernel ports to be used for NFS traffic, and when combined with a 'route based on originating port ID' load-balancing policy, it enables the ESXi host to distribute NFS I/O across multiple physical NICs and paths. This increases aggregate throughput and reduces latency by avoiding congestion on a single VMkernel port or physical link, which is the most effective change for improving storage performance in this scenario.

What should I do if I get this VCP-DCV question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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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