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FC0-U71 Practice Question: That their computer is running slowly and the…
Exhibit
Refer to the exhibit. C:\Users\Admin> netstat -an | find "ESTABLISHED" TCP 192.168.1.10:49152 203.0.113.5:443 ESTABLISHED TCP 192.168.1.10:49153 203.0.113.5:443 ESTABLISHED TCP 192.168.1.10:49154 203.0.113.5:443 ESTABLISHED TCP 192.168.1.10:49155 203.0.113.5:443 ESTABLISHED
A user reports that their computer is running slowly and the network activity light is constantly on. The technician runs the command shown in the exhibit. Based on the output, what is the most likely cause?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The computer is infected with malware communicating with a command-and-control server
The exhibit shows multiple established connections from the local computer to the same remote IP on port 443 (HTTPS). This pattern suggests a botnet or malware establishing multiple command-and-control channels. Option B is correct because it indicates a malware infection. Option A is wrong because a DoS attack would typically show many connections from different sources. Option C is wrong because excessive web browsing would show connections to various IPs, not just one. Option D is wrong because a firewall misconfiguration would block or allow traffic, not create multiple connections.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The computer is experiencing a denial-of-service (DoS) attack
Why it's wrong here
because a DoS attack would typically show many connections from different sources.
- ✓
The computer is infected with malware communicating with a command-and-control server
Why this is correct
because it indicates a malware infection.
- ✗
The user is running excessive web browsing sessions
Why it's wrong here
because excessive web browsing would show connections to various IPs, not just one.
- ✗
The firewall is misconfigured and blocking legitimate traffic
Why it's wrong here
because a firewall misconfiguration would block or allow traffic, not create multiple connections.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U71 exam.