- A
Confirm that the decryption profile is set to 'decrypt' and that the forward proxy option is enabled.
Why wrong: Forward proxy is for outbound decryption; inbound decryption uses 'SSL Inbound Inspection' method.
- B
Check the decryption policy rule order and ensure it is before any no-decrypt rules.
Rule order is the first thing to check; a higher-priority no-decrypt rule would cause the traffic to bypass decryption.
- C
Verify that the server's certificate is installed on the firewall.
Why wrong: Inbound decryption requires the server's private key, not just the certificate; simply installing the cert is insufficient.
- D
Ensure that the firewall has a valid certificate for inbound inspection.
Why wrong: Inbound inspection uses the destination server's certificate, not a firewall certificate.
PCNSA Decryption and Monitoring Practice Question
This PCNSA practice question tests your understanding of decryption and monitoring. 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 team wants to inspect traffic to and from a critical application server. They configure an inbound decryption rule to decrypt traffic destined to the server's IP address. After deploying, they find that traffic is not being decrypted. What is the first step to troubleshoot?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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
Check the decryption policy rule order and ensure it is before any no-decrypt rules.
Option B is correct because in Palo Alto Networks firewalls, decryption policy rules are evaluated in order from top to bottom, and the first matching rule is applied. If a 'no-decrypt' rule appears before the inbound decryption rule, traffic matching the server's IP will be handled by the no-decrypt rule and will not be decrypted. Therefore, verifying rule order is the first troubleshooting step.
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.
- ✗
Confirm that the decryption profile is set to 'decrypt' and that the forward proxy option is enabled.
Why it's wrong here
Forward proxy is for outbound decryption; inbound decryption uses 'SSL Inbound Inspection' method.
- ✓
Check the decryption policy rule order and ensure it is before any no-decrypt rules.
Why this is correct
Rule order is the first thing to check; a higher-priority no-decrypt rule would cause the traffic to bypass decryption.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Verify that the server's certificate is installed on the firewall.
Why it's wrong here
Inbound decryption requires the server's private key, not just the certificate; simply installing the cert is insufficient.
- ✗
Ensure that the firewall has a valid certificate for inbound inspection.
Why it's wrong here
Inbound inspection uses the destination server's certificate, not a firewall certificate.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Palo Alto Networks often tests the misconception that certificate issues are the primary cause of decryption failures, but in Palo Alto environments, rule order and policy evaluation are the most common first-step troubleshooting focus.
Detailed technical explanation
How to think about this question
Inbound SSL Inbound Inspection (also known as 'SSL Forward Proxy with Server Certificate') requires the firewall to terminate the client's SSL connection by presenting a certificate that the client trusts. The firewall must have the server's private key and certificate (or a certificate chaining to a trusted CA) installed in the Decryption Profile. However, even with correct certificates, if a 'no-decrypt' rule (e.g., based on source zone, user, or URL category) is placed above the decrypt rule in the policy, the traffic will skip decryption entirely. Rule order is evaluated before any certificate or key validation occurs.
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 PCNSA 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.
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Decryption and Monitoring — study guide chapter
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FAQ
Questions learners often ask
What does this PCNSA question test?
Decryption and Monitoring — This question tests Decryption and Monitoring — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Check the decryption policy rule order and ensure it is before any no-decrypt rules. — Option B is correct because in Palo Alto Networks firewalls, decryption policy rules are evaluated in order from top to bottom, and the first matching rule is applied. If a 'no-decrypt' rule appears before the inbound decryption rule, traffic matching the server's IP will be handled by the no-decrypt rule and will not be decrypted. Therefore, verifying rule order is the first troubleshooting step.
What should I do if I get this PCNSA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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 →
Last reviewed: Jun 30, 2026
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.
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