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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.

An administrator has configured multiple security rules for a data center. There is a rule that allows SSH from the 'Management' zone to the 'Server' zone. Recently, the administrator added a new rule allowing SSH from a new 'Admin' zone to the 'Server' zone. The Admin rule is placed above the Management rule. Both rules specify the correct zones, application SSH, and action allow. After committing, SSH traffic from the Admin zone is being denied. What is the most likely issue?

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
There is a deny rule placed above the new Admin rule that matches the Admin zone traffic.
Correct. A deny rule above would block the SSH traffic before it reaches the allow rule.
B
The Admin rule has a typo in the destination address, causing it to not match the server.
Why wrong: Incorrect. If the destination address were wrong, the rule would not match at all, but the traffic would then fall through to the Management rule (which allows), so it would not be denied.
C
The Management rule is shadowing the Admin rule due to overlapping conditions.
Why wrong: Incorrect. Shadowing implies the Management rule would match first, but since Admin rule is above, it should match first. Denial indicates a deny rule above.
D
The Admin zone is not associated with the correct virtual router.
Why wrong: Incorrect. If the zone were misconfigured, the traffic would not match the rule at all, but it would not be explicitly denied.

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

✓

There is a deny rule placed above the new Admin rule that matches the Admin zone traffic.

The Admin rule is placed above the Management rule and both allow SSH, so traffic should be allowed by the Admin rule. The most likely reason for denial is that a deny rule exists above the Admin rule that matches the Admin zone traffic, thereby blocking SSH before the Admin rule is evaluated. Option A correctly identifies this.

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.

✓
There is a deny rule placed above the new Admin rule that matches the Admin zone traffic.
Why this is correct
Correct. A deny rule above would block the SSH traffic before it reaches the allow rule.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
✗
The Admin rule has a typo in the destination address, causing it to not match the server.
Why it's wrong here
Incorrect. If the destination address were wrong, the rule would not match at all, but the traffic would then fall through to the Management rule (which allows), so it would not be denied.
✗
The Management rule is shadowing the Admin rule due to overlapping conditions.
Why it's wrong here
Incorrect. Shadowing implies the Management rule would match first, but since Admin rule is above, it should match first. Denial indicates a deny rule above.
✗
The Admin zone is not associated with the correct virtual router.
Why it's wrong here
Incorrect. If the zone were misconfigured, the traffic would not match the rule at all, but it would not be explicitly denied.

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.

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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: There is a deny rule placed above the new Admin rule that matches the Admin zone traffic. — The Admin rule is placed above the Management rule and both allow SSH, so traffic should be allowed by the Admin rule. The most likely reason for denial is that a deny rule exists above the Admin rule that matches the Admin zone traffic, thereby blocking SSH before the Admin rule is evaluated. Option A correctly identifies this.

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.

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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.