CompTIA Security+ Question J-5

A technician is investigating intermittent switch degradation. The issue only seems to occur when the building’s roof air conditioning system runs. Which of the following would reduce the connectivity issues?

A. Adding a heat deflector
B. Redundant HVAC systems
C. Shielding
D. Add a wireless network

Answer: C

Explanation:
EMI can cause circuit overload, spikes, or even electrical component failure. In the question it is mentioned that switch degradation occurs when the building’s roof air-conditioning system is also running. All electromechanical systems emanate EMI. Thus you could alleviate the problem using EMI shielding.

CompTIA Security+ Question D-83

The datacenter design team is implementing a system, which requires all servers installed in racks to face in a predetermined direction. AN infrared camera will be used to verify that servers are properly racked. Which of the following datacenter elements is being designed?

A. Hot and cold aisles
B. Humidity control
C. HVAC system
D. EMI shielding

Answer: A

Explanation:
There are often multiple rows of servers located in racks in server rooms. The rows of servers are known as aisles, and they can be cooled as hot aisles and cold aisles. With a hot aisle, hot air outlets are used to cool the equipment, whereas with cold aisles, cold air intake is used to cool the equipment. Combining the two, you have cold air intake from below the aisle and hot air outtake above it, providing constant circulation. Infrared cameras are heat detection measures thus it is hot and cold aisle design elements.

CompTIA Security+ Question B-83

A company that purchased an HVAC system for the datacenter is MOST concerned with which of the following?

A. Availability
B. Integrity
C. Confidentiality
D. Fire suppression

Answer: A

Explanation:
Availability means simply to make sure that the data and systems are available for authorized users. Data backups, redundant systems, and disaster recovery plans all support availability; as does environmental support by means of HVAC.