VCP-DCV Configure and Manage vSphere Networking Practice Question
An organization uses a VDS with 4 hosts. They want to use Network I/O Control (NIOC) to prioritize vMotion traffic over management traffic. After configuring NIOC, the administrator notices that vMotion performance is not improved. What could be the cause?
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
✓
The vMotion VMkernel adapter is not assigned to the correct network resource pool
NIOC uses network resource pools to apply QoS policies. If the vMotion VMkernel adapter is not assigned to the appropriate network resource pool (e.g., vMotion pool), NIOC will not prioritize vMotion traffic. Option B is incorrect because oversubscribed uplinks can cause congestion but do not prevent NIOC from working; NIOC would still apply its shares to the traffic. Option C is incorrect because NIOC does not rely on CoS tags; it uses shares and limits defined in resource pools. Option D is incorrect because the administrator configured NIOC, implying it is enabled; if it were not enabled, no NIOC functionality would be available.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The vMotion VMkernel adapter is not assigned to the correct network resource pool
Why this is correct
Without assigning the adapter to the vMotion resource pool, NIOC cannot prioritize vMotion traffic.
- ✗
The physical uplinks are oversubscribed
Why it's wrong here
Oversubscription affects overall performance but does not explain why NIOC prioritization is not working.
- ✗
The vMotion traffic is not marked with the appropriate CoS tag
Why it's wrong here
NIOC uses shares and reservations, not CoS markers, to prioritize traffic.
- ✗
NIOC is not enabled on the VDS
Why it's wrong here
If NIOC were not enabled, no traffic shaping would occur, but the administrator configured NIOC, so it is likely enabled.
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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.