- A
The default zone can be changed using firewall-cmd.
--set-default-zone changes the default zone.
- B
A network interface can be assigned to multiple zones simultaneously.
Why wrong: Each interface can be in only one zone at a time.
- C
The 'public' zone is more restrictive than the 'trusted' zone.
Public is untrusted, trusted is least restrictive.
- D
Rich rules can specify source and destination addresses.
Rich rules allow detailed filtering.
- E
Zones can have a default target of only 'DROP' or 'ACCEPT'.
Why wrong: Zones can also have 'default', 'REJECT' targets.
Question 286 of 537
Understanding Firewalld Zones for RHCSA
This EX200 practice question tests your understanding of manage security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which three statements about firewalld zones are correct? (Choose three.)
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 default zone can be changed using firewall-cmd.
Option A is correct because the default zone in firewalld can be changed using the 'firewall-cmd --set-default-zone=<zone>' command. This command updates the runtime and permanent configuration, ensuring that all new network interfaces are automatically assigned to the specified zone unless explicitly overridden.
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 default zone can be changed using firewall-cmd.
Why this is correct
--set-default-zone changes the default zone.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A network interface can be assigned to multiple zones simultaneously.
Why it's wrong here
Each interface can be in only one zone at a time.
- ✓
The 'public' zone is more restrictive than the 'trusted' zone.
Why this is correct
Public is untrusted, trusted is least restrictive.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Rich rules can specify source and destination addresses.
Why this is correct
Rich rules allow detailed filtering.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Zones can have a default target of only 'DROP' or 'ACCEPT'.
Why it's wrong here
Zones can also have 'default', 'REJECT' targets.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a network interface can belong to multiple zones simultaneously (like in some other firewall systems), but firewalld enforces a strict one-interface-per-zone binding, and they may also forget that zones support 'REJECT' and 'default' targets, not just 'DROP' and 'ACCEPT'.
Detailed technical explanation
How to think about this question
Firewalld zones are defined in XML files under /usr/lib/firewalld/zones/ and /etc/firewalld/zones/, each with a <target> element that controls the default policy for unmatched traffic. The 'trusted' zone uses 'ACCEPT' as its default target, while 'public' uses 'default' (which effectively drops incoming traffic unless explicitly allowed), making 'public' more restrictive. Rich rules allow fine-grained control by specifying source and destination addresses, ports, protocols, and even connection marks, enabling complex policy scenarios like allowing SSH only from a specific subnet.
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 EX200 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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Manage security — study guide chapter
Learn the concepts, then practise the questions
- →
Manage security practice questions
Targeted practice on this topic area only
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Red Hat Certified System Administrator EX200 study guide
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FAQ
Questions learners often ask
What does this EX200 question test?
Manage security — This question tests Manage security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The default zone can be changed using firewall-cmd. — Option A is correct because the default zone in firewalld can be changed using the 'firewall-cmd --set-default-zone=<zone>' command. This command updates the runtime and permanent configuration, ensuring that all new network interfaces are automatically assigned to the specified zone unless explicitly overridden.
What should I do if I get this EX200 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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Last reviewed: Jul 4, 2026
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