← PCNSA·Palo Alto Networks

Question 148 of 529

Policy Evaluation and Management →mediumMultiple ChoiceObjective-mapped

PCNSA Policy Evaluation and Management Practice Question

This PCNSA practice question tests your understanding of policy evaluation and management. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.

A security administrator is troubleshooting a rule that appears to be matching correctly but is not allowing traffic. The rule uses source zone 'Trust' and destination zone 'Untrust', and the action is 'allow'. The traffic source is in the 'DMZ' zone. What is the most likely reason the traffic is denied?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

A
Security profiles are blocking the traffic.
Why wrong: Security profiles are applied after the rule allows traffic, but the rule does not match due to zone mismatch.
B
The application is not identified.
Why wrong: Application identification occurs after matching, but the rule first needs to match on zones.
C
The source zone of the rule does not match the traffic's ingress zone.
The rule matches on source zone Trust, but traffic comes from DMZ zone, so the rule does not apply.
D
The rule is placed after a deny rule.
Why wrong: If the rule is before a deny rule and zones match, it would allow; but zone mismatch prevents match.

Full breakdown with real-world context →

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 source zone of the rule does not match the traffic's ingress zone.

Option C is correct. The rule is configured with source zone 'Trust', but the traffic originates from the 'DMZ' zone. Since zones must match for a rule to apply, the rule does not match the traffic, so it is denied by the implicit deny rule. Options A, B, and D are incorrect: Security profiles (A) only apply after a rule matches; application identification (B) is not related to zone mismatch; and rule order (D) is irrelevant because the rule does not match due to zone mismatch.

Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Security profiles are blocking the traffic.
Why it's wrong here
Security profiles are applied after the rule allows traffic, but the rule does not match due to zone mismatch.
✗
The application is not identified.
Why it's wrong here
Application identification occurs after matching, but the rule first needs to match on zones.
✓
The source zone of the rule does not match the traffic's ingress zone.
Why this is correct
The rule matches on source zone Trust, but traffic comes from DMZ zone, so the rule does not apply.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
✗
The rule is placed after a deny rule.
Why it's wrong here
If the rule is before a deny rule and zones match, it would allow; but zone mismatch prevents match.

Common exam traps

Common exam trap: ACLs stop at the first match

ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.

Detailed technical explanation

How to think about this question

ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.

KKey Concepts to Remember

Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.

TExam Day Tips

Check inbound versus outbound direction.
Read the ACL from top to bottom.
Look for a broader permit or deny above the intended line.

Key takeaway

ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.

Real-world example

How this comes up in practice

A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.

What to study next

Got this wrong? Here's your next step.

Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCNSA ACL questions on filtering logic and placement.

Related PCNSA practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Managing Objects practice questions

Practise PCNSA questions linked to Managing Objects.

Policy Evaluation and Management practice questions

Practise PCNSA questions linked to Policy Evaluation and Management.

Securing Traffic practice questions

Practise PCNSA questions linked to Securing Traffic.

Core Concepts practice questions

Practise PCNSA questions linked to Core Concepts.

Palo Alto Networks Platforms and Architecture practice questions

Practise PCNSA questions linked to Palo Alto Networks Platforms and Architecture.

Device Management and Services practice questions

Practise PCNSA questions linked to Device Management and Services.

App-ID and Content-ID practice questions

Practise PCNSA questions linked to App-ID and Content-ID.

Decryption and Monitoring practice questions

Practise PCNSA questions linked to Decryption and Monitoring.

PCNSA fundamentals practice questions

Practise PCNSA questions linked to PCNSA fundamentals.

PCNSA scenario practice questions

Practise PCNSA questions linked to PCNSA scenario.

PCNSA troubleshooting practice questions

Practise PCNSA questions linked to PCNSA troubleshooting.

Practice this exam

Start a free PCNSA practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions 20 questions 30 questions 50 questions Timed 30

PCNSA practice-test guide →Study guide →Browse all practice tests

FAQ

Questions learners often ask

What does this PCNSA question test?

Policy Evaluation and Management — This question tests Policy Evaluation and Management — Standard ACLs match source addresses..

What is the correct answer to this question?

The correct answer is: The source zone of the rule does not match the traffic's ingress zone. — Option C is correct. The rule is configured with source zone 'Trust', but the traffic originates from the 'DMZ' zone. Since zones must match for a rule to apply, the rule does not match the traffic, so it is denied by the implicit deny rule. Options A, B, and D are incorrect: Security profiles (A) only apply after a rule matches; application identification (B) is not related to zone mismatch; and rule order (D) is irrelevant because the rule does not match due to zone mismatch.

What should I do if I get this PCNSA question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Standard ACLs match source addresses.

About these practice questions

Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Keep practising

Question Discussion

Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.

Loading comments…

This PCNSA practice question is part of Courseiva's free Palo Alto Networks 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 PCNSA exam.