An administrator has upgraded to vSphere 6.5 and also wants to use Kerberos authentication for NFS.
Which can be done to the existing NFSv3 volumes to enable this feature?

A.
Perform a storage rescan on VMFS volumes.
B.
Unmount the NFSv3 datastore, and then mount as NFSv4.1 datastore.
C.
Nothing. All NFSv3 mounted datastores are upgraded automatically during vSphere upgrades.
D.
Perform a scan of new storage devices.
Explanation:
NFS 4.1 supports the Kerberos authentication protocol to secure communication with the NFS server
B, NFS 3 does not support Kerberos.
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A possible variation on this one is :
A vSphere administrator wants to upgrade NFS 3 datastores to NFS 4.1 on ESXi 6.5 hosts with running production virtual machines.
Which option is valid?
A. Run ESXi command to upgrade the datastore.
B. Unmount the datastore from a single host, then mount it as NFS 4.1 datastore, and repeat this one host at a time until the mount has been upgraded on all hosts.
C. Create a new NFS 4.1 datastore, and then use Storage vMotion to migrate virtual machines from the old datastore to the new one.
D. Right click the datastore and upgrade it as a NFS
4.1 datastore.
Answer: C
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