The correct answer is to configure multiple VMkernel ports for NFS and enable port binding with a route based on originating port ID policy. This works because NFS port binding, also known as NFS multipathing, allows the ESXi host to actively use multiple VMkernel ports for NFS traffic, and the originating port ID policy distributes individual virtual machine I/O requests across different physical NICs and paths. By spreading the load, you prevent a single VMkernel port or physical link from becoming a bottleneck, which directly reduces latency and increases aggregate throughput for the VM’s virtual disks. On the VCP-DCV exam, this scenario tests your understanding of NFS performance optimization and the distinction between simple multiple VMkernel ports (which are passive) versus port binding with active load balancing. A common trap is thinking that just adding more VMkernel ports improves performance—without port binding and the correct load-balancing policy, only one port is active at a time. Memory tip: think “Port Binding = Ports in Action” to remember that binding makes all ports work simultaneously.
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.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. 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?
hard
A.Jumbo frames are enabled on the ESXi hosts but not on the NFS server
✓ B.Network congestion is causing TCP retransmissions
C.The NFS server is performing data deduplication on the datastore
D.The NFS datastore is mounted with read-only permissions
Why B: 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.
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This VCP-DCV practice question is part of Courseiva's free VMware certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the VCP-DCV exam.
Question Discussion
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