VCP-DCV vSphere Performance and Scaling Practice Question
A vSphere administrator is tasked with scaling a cluster to support a new workload that requires high network throughput. The existing hosts have 10GbE NICs and are using the default vmnic driver. Which technology can improve network performance without additional hardware?
⚠ Common exam trap
Test-takers frequently confuse SR-IOV as a software-only feature, but it requires hardware support and dedicated NIC configuration, whereas NetQueue is a native vSphere optimization that works with standard drivers and no extra hardware.
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
✓
Enable NetQueue and increase the number of RX queues.
NetQueue is a VMware technology that distributes network packet processing across multiple CPU cores by increasing the number of receive (RX) queues on the physical NIC. This reduces CPU bottlenecks and improves throughput for high-bandwidth workloads without requiring additional hardware. The default vmnic driver in vSphere supports NetQueue, making it a software-only performance enhancement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable SR-IOV on the physical NICs.
Why it's wrong here
SR-IOV may require hardware support and BIOS configuration, not purely software.
- ✓
Enable NetQueue and increase the number of RX queues.
Why this is correct
NetQueue distributes packet processing across multiple CPUs, improving network performance.
- ✗
Increase the number of vCPUs for each VM.
Why it's wrong here
More vCPUs does not directly improve network throughput.
- ✗
Use vSphere vMotion to balance load.
Why it's wrong here
vMotion balances VMs but does not improve network performance per host.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.