ACCA Applied Knowledge · Business and Technology · Financial systems and technology
Which of the following is an example of a preventive, rather than detective, cyber security control?
A firewall blocking unauthorised inbound traffic is a preventive control because it stops unauthorised access before it happens. Reviewing intrusion alerts or access logs only identifies suspicious activity after it has begun or occurred, so those are detective controls.
- AIntrusion detection system alerts reviewed daily
- BFirewall blocking unauthorised inbound trafficCorrect
- CReview of system access logs after an incident
Explanation
A firewall stops unauthorised traffic before it enters the network, so it prevents. Intrusion alerts and log reviews identify problems after they have occurred or begun, so they detect.
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