XK0-006 Security Practice Question
An administrator needs to allow incoming TCP traffic on port 8443 using firewalld. Which command should be used to make this change persistent?
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 --add-port=8443/tcp --permanent && firewall-cmd --reload
To add a port, use firewall-cmd --add-port=8443/tcp --permanent and then 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-port=8443/tcp
Why it's wrong here
Missing --permanent; also no reload.
- ✗
firewall-cmd --add-service=8443/tcp --permanent
Why it's wrong here
--add-service is for service names, not ports.
- ✗
firewall-cmd --add-port=8443/tcp
Why it's wrong here
Missing --permanent; change will not survive reload.
- ✓
firewall-cmd --add-port=8443/tcp --permanent && firewall-cmd --reload
Why this is correct
Adds port persistently and reloads to apply.
Go deeper
Related to this question
About these practice questions
Courseiva writes every XK0-006 question from scratch — 979 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.