Which statement is true about a failover configuration?
A.
The secondary server can be a smaller, less expensive server since it will only be used for short-term call handling.
B.
Microsoft SQL Server is always required with a failover configuration whether with an Exchange or Domino mailstore.
C.
A DiRT backup must be run on the primary server and “restored” on the secondary server before installation to synchronize databases.
D.
SQL Server is only required with a Microsoft Exchange mailstore. If failover is installed in a Domino solution, then the IBM Database for Domino is used as the data store mechanism.