Examine the Data Guard configuration: DGMGRL> show configuration; Configuration - Animals Protection Mode: MaxPerformance Databases: dogs- Primary…

The error indicates that switching the protection mode to Maximum Protection is not possible due to

the presence of a snapshot standby database in the Data Guard configuration, which cannot

participate in synchronous redo transport required by the Maximum Protection mode. Therefore, the

correct answer is:

D. Cats is a snapshot standby database.

Comprehensive Detailed Explanation:

In an Oracle Data Guard environment, the Maximum Protection mode requires that all redo data be

transmitted synchronously to at least one standby database, ensuring no data loss even in the event

of a primary database failure. However, a snapshot standby database, by its nature, allows read-

write access and is temporarily disconnected from the redo stream, which makes it unable to

participate in the synchronous redo transport required by Maximum Protection mode. The presence

of a snapshot standby database in the Data Guard configuration thus prevents the activation of

Maximum Protection mode, as it cannot guarantee zero data loss without a standby database

capable of receiving redo data synchronously.

Reference:

Oracle Data Guard documentation clearly outlines the requirements and restrictions of different

protection modes, including the necessity for standby databases to participate in synchronous redo

transport to enable Maximum Protection mode. The inability of snapshot standby databases to fulfill

this requirement is a key consideration when planning Data Guard configurations and protection

levels.