VCP-DCV vSphere Performance and Scaling Practice Question
Which THREE techniques are recommended to improve virtual machine network performance in a vSphere environment? (Select three.)
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 Jumbo Frames on the virtual switch.
Correct: A (Enable Jumbo Frames), B (Use VMXNET3), and E (Enable SR-IOV). Jumbo Frames reduce CPU overhead for large packets by allowing larger MTU. VMXNET3 is a paravirtualized adapter that provides high performance and lower latency. SR-IOV allows a physical NIC to be directly assigned to a VM, bypassing the hypervisor's virtual switch for near-native performance. Option C (dedicated virtual switch per VM) adds complexity without improving performance. Option D (e1000e) is an emulated adapter that is slower than VMXNET3 and should not be used for performance.
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 Jumbo Frames on the virtual switch.
Why this is correct
Jumbo Frames reduce per-packet CPU overhead, improving throughput.
- ✓
Use the VMXNET3 virtual network adapter.
Why this is correct
VMXNET3 is a high-performance paravirtualized adapter.
- ✗
Use a dedicated virtual switch for each VM.
Why it's wrong here
Dedicated vSwitches increase management complexity without performance benefit.
- ✗
Use the e1000e network adapter type.
Why it's wrong here
e1000e is an emulated adapter with higher overhead.
- ✓
Enable SR-IOV on supported NICs.
Why this is correct
SR-IOV allows VMs to directly access physical NICs, reducing latency.
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JA
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.