CompTIA A+ Core 2 (220-1002) — Question 324

A user's computer is running slow even when only one program is open. A technician discovers the CPU is running at 100%, and there is a significant amount of outgoing network traffic.
Which of the following is MOST likely causing the high resource usage?

Answer options

• A. A keylogger is running
• B. The computer is part of a botnet
• C. The computer is receiving a DDoS attack
• D. A software firewall is blocking traffic

Correct answer: B

Explanation

The correct answer is B because being part of a botnet can lead to high CPU usage and significant outgoing traffic as the computer is controlled to perform tasks for the botnet. Options A, C, and D are less likely; a keylogger would not typically cause high CPU usage, a DDoS attack usually affects incoming traffic rather than outgoing, and a firewall blocking traffic would not typically result in high resource usage.