You are editing the management network configuration of an ESXi 6.x Host from the vSphere Web Client. You mistakenly put the incorrect VLAN in place for the
management network.
What action do you need to take to correct this?

A.
You need to manually edit the configuration on the host with command line utilities.

B.
No action is required. By default ESXi rolls back configuration changes that disconnect the host.

C.
The ESXi host system configuration will need to be restored to the factory configuration to fix the issue.

D.
The change can be reverted in the vSphere Web Client by simply editing the switch again.

Explanation:
Host networking rollbacks occur when an invalid change is made to the host networking configuration. Every network change that disconnects a host also triggers a
rollback.
https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2032908