Which two statements are true about a failover configuration? (Choose two.)

A.
The servers must match exactly: for example, the same amount of memory, the same processor type and speed, and the same chassis type.

B.
The second or failover server can be a smaller, less expensive server. All it will be doing is short-term application handling while the main server is temporarily off line.

C.
SQL Server is always required with failover. SQL Server will work with either an Exchange or a Domino
mail store.

D.
SQL Server is only required with a Microsoft Exchange mail store. If failover is installed in a Domino solution, then the IBM DataBase for Domino is used as the data storage mechanism.

E.
SQL Server or DataBase for Domino is used only for Cisco Unity applications that have more than 500 subscribers installed. An application with fewer than 500 subscribers can use MSDE or DataBase for Domino Lite.