- A
Use a standard virtual switch instead of a distributed switch.
Why wrong: Incorrect: Standard switches have fewer features; distributed switches can offer better performance with features like NetFlow and port mirroring.
- B
Configure NetQueue on the physical NIC.
Correct: NetQueue distributes interrupts to multiple CPUs, reducing latency.
- C
Enable SR-IOV on the physical NIC and assign the virtual function to the VM.
Correct: SR-IOV provides direct hardware access, reducing latency.
- D
Enable jumbo frames on the virtual switch.
Why wrong: Incorrect: Jumbo frames reduce CPU usage but can increase latency due to larger frame size.
- E
Disable TCP segmentation offload on the VM.
Why wrong: Incorrect: Disabling offloading increases CPU load and can increase latency.
Quick Answer
The answer is to enable SR-IOV on the physical NIC and assign the virtual function to the VM, combined with leveraging NetQueue to distribute packet processing across multiple CPUs. SR-IOV bypasses the hypervisor’s virtual switch entirely, allowing the VM direct hardware access to the NIC, which drastically cuts latency by eliminating software overhead. NetQueue further reduces latency by using multiple receive queues on the physical NIC, enabling parallel packet handling and minimizing interrupt coalescing delays that can stall time-sensitive traffic. On the VCP-DCV exam, this topic tests your understanding of how to optimize network performance for latency-sensitive workloads like VoIP or financial trading applications, often appearing as a “choose two” question where one distractor might suggest using a software switch or increasing MTU. A common trap is confusing NetQueue with SR-IOV—remember that SR-IOV provides direct hardware bypass, while NetQueue spreads the CPU load. Memory tip: “SR-IOV skips the switch, NetQueue splits the queues.”
VCP-DCV vSphere Performance and Scaling Practice Question
This VCP-DCV practice question tests your understanding of vsphere performance and scaling. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO actions can help reduce network latency for a latency-sensitive VM in a vSphere environment? (Choose two.)
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 NetQueue on the physical NIC.
NetQueue improves network performance by distributing packet processing across multiple CPUs, reducing the overhead on a single core and lowering latency for latency-sensitive VMs. This is achieved by using multiple receive queues on the physical NIC, which allows parallel packet handling and minimizes interrupt coalescing delays.
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.
- ✗
Use a standard virtual switch instead of a distributed switch.
Why it's wrong here
Incorrect: Standard switches have fewer features; distributed switches can offer better performance with features like NetFlow and port mirroring.
- ✓
Configure NetQueue on the physical NIC.
Why this is correct
Correct: NetQueue distributes interrupts to multiple CPUs, reducing latency.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Enable SR-IOV on the physical NIC and assign the virtual function to the VM.
Why this is correct
Correct: SR-IOV provides direct hardware access, reducing latency.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable jumbo frames on the virtual switch.
Why it's wrong here
Incorrect: Jumbo frames reduce CPU usage but can increase latency due to larger frame size.
- ✗
Disable TCP segmentation offload on the VM.
Why it's wrong here
Incorrect: Disabling offloading increases CPU load and can increase latency.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse throughput-enhancing features (like jumbo frames or TSO) with latency-reducing features, failing to recognize that SR-IOV and NetQueue directly address packet processing overhead and interrupt handling.
Detailed technical explanation
How to think about this question
NetQueue leverages multiple hardware receive queues (RSS) to spread interrupt handling across vCPUs, which is critical for 10GbE+ networks where a single CPU can become a bottleneck. SR-IOV bypasses the hypervisor's virtual switch entirely, allowing the VM to directly access a physical function (PF) via a virtual function (VF), reducing latency by eliminating context switches and packet copying. In real-world scenarios, SR-IOV is often used for high-frequency trading or NFV workloads where microsecond-level latency matters.
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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vSphere Performance and Scaling — study guide chapter
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FAQ
Questions learners often ask
What does this VCP-DCV question test?
vSphere Performance and Scaling — This question tests vSphere Performance and Scaling — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure NetQueue on the physical NIC. — NetQueue improves network performance by distributing packet processing across multiple CPUs, reducing the overhead on a single core and lowering latency for latency-sensitive VMs. This is achieved by using multiple receive queues on the physical NIC, which allows parallel packet handling and minimizes interrupt coalescing delays.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
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.
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