A.incremental backup

B.full backup

C.differential backup

D.Real-time backup

A.Perform the drills in accordance with the real disaster recovery steps.

B.Through disaster tolerance drills, business integrity cannot be checked

C.Familiarize with the disaster recovery process through disaster recovery, and exercise business recovery capabilities when a disaster strikes

D.Disaster recovery drills are verification and the most effective means to prove the availability of the system

A.TRUE

B.FALSE

A.True

B.False

A.The RTO time of the data center adopting the cold standby mode is long and unpredictable.

B.The data center with the active-active mode has the shortest RTO time.

C.Hot standby mode requires the highest software cost.

D.When the service is unavailable due to a data center failure, the hot standby and active-active modes can automatically switch services with software, while the warm standby mode requires manual intervention, and the cold standby mode requires strong manual intervention.