VMware App Volumes Specialist (2021) — Question 55

As a part of a network hardware refresh project, all the network switches have been replaced with a newer, high-performance model. After the replacement, the company users started experiencing slowness on the applications hosted on their vSAN-backed VMs.

The vSAN administrator checked the vSAN Network Health status and noticed that the "Hosts large ping test" has failed.

What could be the cause of this performance degradation issue?

Answer options

• A. MTU 9K is not configured on the hosts vSAN vMKernel ports.
• B. MTU 9K is not configured on the hosts VMnic ports.
• C. MTU 9K is not configured on the ToR switch.
• D. MTU 9K is not configured on the vDS switch.

Correct answer: C

Explanation

The correct answer is C because if the ToR switch is not configured with the correct MTU size (9K), it can cause packet fragmentation, leading to performance issues. Options A and B refer to the configuration on hosts' ports, which would not affect the overall network performance in the same way. Option D pertains to the vDS switch configuration, which is not the source of the issue in this scenario.