Question 64 of 498
VCP-DCV Configure and Manage vSphere Networking Practice Question
A vSphere environment uses a vSphere Distributed Switch (vDS) with 10G uplinks and Network I/O Control (NIOC) enabled. Administrators report that during peak traffic, NFS storage traffic is experiencing high latency, while other traffic types remain unaffected. The vDS has default NIOC shares and limits. Which action should be taken to prioritize NFS traffic without completely starving other traffic?
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
✓
Increase the shares for the NFS traffic class.
Increasing the shares for the NFS traffic class gives it a higher proportion of bandwidth during contention, without imposing a hard limit. Option A is incorrect because setting a low bandwidth limit would cap NFS traffic, potentially worsening performance. Option C is incorrect because setting a high bandwidth reservation could reserve bandwidth for NFS even when not needed, potentially wasting resources, and does not prioritize dynamically like shares do. Option D is incorrect because disabling NIOC removes all traffic prioritization, eliminating the ability to differentiate NFS traffic.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set a low bandwidth limit for the NFS traffic class.
Why it's wrong here
Limiting NFS traffic would cap its performance, which is the opposite of the desired outcome.
- ✓
Increase the shares for the NFS traffic class.
Why this is correct
Increasing shares gives NFS higher relative weight during contention, ensuring it gets more bandwidth without hard limits, thus reducing latency while allowing other traffic to still use remaining bandwidth.
- ✗
Set a high bandwidth reservation for the NFS traffic class.
Why it's wrong here
Reservation guarantees minimum bandwidth but doesn't help with peak contention; it could also starve other traffic if NFS continuously uses reserved bandwidth.
- ✗
Disable Network I/O Control on the vDS.
Why it's wrong here
Disabling NIOC removes all prioritization, causing all traffic types to compete equally, likely worsening NFS latency.
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Last reviewed: Jun 24, 2026
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