This XK0-005 practice question tests your understanding of troubleshooting. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Refer to the exhibit. A Linux administrator runs the netstat command to check listening services. The output shows that services are listening on ports 22, 80, and 443. Which of the following conclusions is correct based on the exhibit?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The Apache HTTP server is running and listening on both port 80 and port 443
The netstat output shows services listening on ports 80 and 443, which are the standard ports for HTTP and HTTPS respectively. Apache HTTP server is the most common service that listens on both these ports simultaneously. The fact that both ports are listed as listening indicates that Apache (or another web server) is bound to these ports and ready to accept connections.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 Apache HTTP server is running and listening on both port 80 and port 443
Why this is correct
The exhibit shows httpd (Apache) listening on ports 80 and 443.
Related concept
Read the scenario before looking for a memorised answer.
✗
The HTTP server is only listening on the loopback interface
Why it's wrong here
The exhibit shows 0.0.0.0, meaning all interfaces, not just loopback.
✗
A firewall is blocking incoming connections to port 443
Why it's wrong here
The exhibit does not provide any firewall information.
✗
The SSH daemon is configured to listen on a non-standard port
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the distinction between a service listening on a port and a firewall blocking traffic to that port; candidates mistakenly think a listening service means traffic is reaching it, but netstat only shows the socket state, not firewall rules.
Trap categories for this question
Command / output trap
The exhibit shows 0.0.0.0, meaning all interfaces, not just loopback.
Detailed technical explanation
How to think about this question
The netstat -tlnp command shows TCP listening sockets with numeric addresses and ports. When a service listens on 0.0.0.0:80, it binds to all available IPv4 interfaces. Apache HTTP Server typically uses a prefork or worker MPM model and can handle both HTTP (80) and HTTPS (443) traffic by loading mod_ssl for TLS encryption. In real-world scenarios, administrators often use 'ss -tlnp' instead of netstat as it is more modern and provides similar information.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the XK0-005 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this XK0-005 question in full detail.
Troubleshooting — This question tests Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Apache HTTP server is running and listening on both port 80 and port 443 — The netstat output shows services listening on ports 80 and 443, which are the standard ports for HTTP and HTTPS respectively. Apache HTTP server is the most common service that listens on both these ports simultaneously. The fact that both ports are listed as listening indicates that Apache (or another web server) is bound to these ports and ready to accept connections.
What should I do if I get this XK0-005 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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