CompTIA A+ Core 2 (220-1102) — Question 490

During a routine check, a systems administrator discovers that a user’s PC is running slowly and CPU utilization is at 100%. Further investigation shows a large amount of resource usage. Which of the following is the most likely cause of the high resource usage?

Answer options

• A. Firewall activities
• B. Botnet attack
• C. DDoS attack
• D. Keylogger attack

Correct answer: B

Explanation

The correct answer is B, a Botnet attack, as this type of attack often leads to high resource utilization due to the infected computer being used as part of a larger network for malicious activities. The other options, such as A (Firewall activities), C (DDoS attack), and D (Keylogger attack), are less likely to cause such a significant increase in CPU usage on a single user’s PC.