XK0-006 Security Practice Question
A web server running on port 8080 must be accessible from external networks. The system uses firewalld. Which command opens port 8080/tcp permanently in the default zone?
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
✓
firewall-cmd --permanent --add-port=8080/tcp
The correct firewalld command is 'firewall-cmd --permanent --add-port=8080/tcp' followed by '--reload'.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
firewall-cmd --zone=public --add-service=8080/tcp --permanent
Why it's wrong here
--add-service expects service name, not port/protocol.
- ✓
firewall-cmd --permanent --add-port=8080/tcp
Why this is correct
Correct: --permanent makes it persistent, --add-port opens the port.
- ✗
iptables -A INPUT -p tcp --dport 8080 -j ACCEPT
Why it's wrong here
iptables is not firewalld; the question specifies firewalld.
- ✗
firewall-cmd --add-port=8080/tcp
Why it's wrong here
Missing --permanent, change is runtime only.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 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 XK0-006 exam.