What are the two different types of database duplication? (Choose two.)
A. Active
B. Passive
C. Online
D. Backup-based
E. Failure driven
Active database duplication takes place using network connections between the target
database and auxiliary database instance.Backup-based duplication requires that the
RMAN backup set pieces be available on the server where the duplicate database will
be created.
原文：http://www.cnblogs.com/Babylon/p/7794434.html