671.Examine the following RMAN command:
RMAN> CONFIGURE ENCRYPTION FOR DATABASE ON;
RMAN> BACKUP DATABASE PLUS ARCHIVELOG;
Which prerequisite must be met before accomplishing the backup?
A. Provide a password for the encryption
B. Set up an Oracle wallet for the encryption
C. No setup is required as it is a default encryption method
D. Both Oracle wallet and password must be set up for the encryption
Answer: B
答案解析:
参考:加密备份:http://blog.csdn.net/rlhua/article/details/12312463
可使用以下三种方法之一对备份进行加密:
• 透明加密:此方法使用wallet,是默认模式。
• 口令加密:此加密方法依赖于口令,不需要配置wallet。若要还原,必须知道用于备份的口令。
• 双模式加密:可同时使用透明加密和口令加密。若要还原,可使用透明模式或口令模式。
如果通常将备份还原到本地站点,但偶尔也会将备份传送到其它站点,则这种类型的加密十分有用。
CONFIGURE ENCRYPTION FOR DATABASE ON;
At this stage, all RMAN backup sets created by this database use transparent encryption by default.