CompTIA Security+ Question B-12

A company recently experienced data loss when a server crashed due to a midday power outage.
Which of the following should be used to prevent this from occurring again?

A. Recovery procedures
B. EMI shielding
C. Environmental monitoring
D. Redundancy

Answer: D

Redundancy refers to systems that either are duplicated or fail over to other systems in the event of a malfunction (in this case a power outage). Failover refers to the process of reconstructing a system or switching over to other systems when a failure is detected. In the case of a server, the server switches to a redundant server when a fault is detected. This strategy allows service to continue uninterrupted until the primary server can be restored.