CompTIA Security Plus Mock Test Q457

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

Correct Answer: D
Section: Compliance and Operational Security

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.

Incorrect Answers:
A: A recovery procedure is done after the damage has occurred, it does not prevent the damage.
B: EMI Shielding refers to the process of preventing electronic emissions from your computer systems from being used to gather intelligence and preventing outside electronic emissions from disrupting your information-processing abilities.
C: Environmental concerns include considerations about water and flood damage as well as fire suppression.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 32, 380, 383