You currently have one Cisco WCS server on your network and you would like to add a second
WCS server for high availability. Which one of these options is not required to configure high
availability?

A.
Both WCS servers must run on the same operating system.

B.
Both WCS servers must be in the same subnet.

C.
Both WCS servers must run the same software release.

D.
The primary WCS server must have an SMTP server configured.