Regarding the characteristics of the four disaster recovery modes of active-active, hot standby, warm standby, and cold standby, which of the following statement is wrong?

Regarding the characteristics of the four disaster recovery modes of active-active, hot standby, warm standby, and cold standby, which of the following statement is wrong?
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 . 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.
D . Hot standby mode requires the highest software cost.

View Answer

Answer: D