This PCNSA practice question tests your understanding of managing objects. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Refer to the exhibit. A newly deployed web server has an address object with tags 'Production' and 'Web'. However, the 'Allow SSL to Internet' security rule using the dynamic address group 'MyServers' as source is not matching traffic destined to the internet. What is the most likely cause?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The filter syntax is invalid; 'andd' should be 'and'.
Option D is correct because the dynamic address group filter uses the operator 'andd', which is a typo or invalid syntax. In PAN-OS, the correct operator for combining tags in a dynamic address group filter is 'and' (lowercase, no extra 'd'). The invalid filter causes the dynamic group to have no matching members, so the security rule 'Allow SSL to Internet' does not match traffic from the web server.
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 address object must be a member of a static address group to be included in a dynamic group.
Why it's wrong here
Dynamic groups use tags; membership in a static group is not required.
✗
The security rule must specify the source zone explicitly.
Why it's wrong here
The source zone is defined in the security rule separately; the address group is a source address, not zone.
✗
The dynamic address group filter uses 'andd' which is a valid operator in older PAN-OS versions.
Why it's wrong here
'andd' is a typo; only 'and' is valid.
✓
The filter syntax is invalid; 'andd' should be 'and'.
Why this is correct
The typo 'andd' makes the filter invalid; correcting to 'and' resolves the issue.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The dynamic address group only updates its membership after a system reboot.
Why it's wrong here
Dynamic address groups update after commit or during policy evaluation; reboot is not required.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may overlook the typo 'andd' and focus on other plausible but incorrect causes, such as zone configuration or reboot requirements, rather than recognizing the invalid filter syntax as the root cause.
Detailed technical explanation
How to think about this question
Dynamic address groups in PAN-OS use tag-based filters with operators like 'and', 'or', and 'not' to include address objects. The filter is evaluated at rule commit time and when object tags change, without requiring a reboot. A typo like 'andd' causes the filter to fail silently, resulting in an empty group, which is a common misconfiguration in production environments.
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.
Managing Objects — This question tests Managing Objects — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The filter syntax is invalid; 'andd' should be 'and'. — Option D is correct because the dynamic address group filter uses the operator 'andd', which is a typo or invalid syntax. In PAN-OS, the correct operator for combining tags in a dynamic address group filter is 'and' (lowercase, no extra 'd'). The invalid filter causes the dynamic group to have no matching members, so the security rule 'Allow SSL to Internet' does not match traffic from the web server.
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: "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?
Read the scenario before looking for a memorised answer.
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Question Discussion
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