Which three VMware-recommended best practices should an administrator follow before upgrading to vSphere 6.5? (Choose three.)
A. Disconnect ESXi host from vCenter.
B. VMware Tools are insta
lled in the virtual machine.
C. Ensure that the system hardware complies with ESXi requirements.
D. Back up the host.
E. Check the interoperability of any other software integrated with vSphere.
Reference:
https://kb.vmware.com/selfservic
e/microsites/search.do? language=en_US&cmd=displayKC&externalId=2130664
C.
Hardware: Before starting the upgrade phase of your existing vSphere environment, ensure that your hardware is compatible and you are not using any deprecated devices. Use the following to determine if the hardware used in your environment is compatible with ESXi 6.0
E.
Use the following to determine which versions of these VMware solutions are compatible with vCenter Server 6.0 and the sequence in which to upgrade. Additionally, use the following to ensure that the databases used by vCenter Server or any other VMware solutions are running a compatible editions, Versions and Service Packs. Contact your third party vendors in order to ensure that their products will work with vSphere 6.0
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D.
Back up the host before performing an upgrade. If the upgrade fails, you can restore the host.
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