The answer is that the URL Filtering profile is set to 'alert' instead of 'block' for the relevant categories. When a URL Filtering profile is configured with an 'alert' action, the firewall logs the violation and generates a security alert, but it does not drop or deny the traffic; the session is allowed to proceed to the destination. This is why users can still access blocked categories even though the security policy correctly applies the URL Filtering profile to outbound HTTP traffic from the Corporate zone to the Internet zone. On the PCNSA exam, this scenario tests your understanding of the difference between 'alert' and 'block' actions within URL Filtering profiles—a common trap is assuming that simply applying a profile enforces blocking, when in fact the action per category determines enforcement. Remember the memory tip: "Alert allows, block denies"—if you see users bypassing restrictions, always check the action, not just the rule.
PCNSA Policy Evaluation and Management Practice Question
This PCNSA practice question tests your understanding of policy evaluation and management. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 organization has a security policy that requires all outbound HTTP traffic from the 'Corporate' zone to the 'Internet' zone to be inspected by the URL Filtering profile. However, the administrator notices that some users can still access blocked categories. 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 URL Filtering profile is set to 'alert' instead of 'block' for the relevant categories.
Option D is correct because if the URL Filtering profile is set to 'alert' instead of 'block' for the relevant categories, the firewall will log the violation but still allow the traffic to pass. This means users can access blocked categories even though the rule is correctly applied, as the profile does not enforce a blocking action.
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 firewall is configured to use DNS sinkholing, which bypasses URL filtering.
Why it's wrong here
DNS sinkholing is a separate feature and does not affect URL filtering inspection.
✗
The rule is placed too low in the rulebase and a higher rule allows traffic without URL filtering.
Why it's wrong here
If the rule is at the top, it should match first; but the issue might be profile configuration.
✗
The rule uses a source zone of 'Corporate' but the users are in a different zone.
Why it's wrong here
The stem states the rule matches Corporate zone; users are in that zone.
✓
The URL Filtering profile is set to 'alert' instead of 'block' for the relevant categories.
Why this is correct
An alert action logs but allows traffic; it does not block.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a rule with a URL Filtering profile automatically blocks traffic for blocked categories, but they overlook that the profile's per-category action must be set to 'block' to actually deny the traffic.
Detailed technical explanation
How to think about this question
URL Filtering profiles in Palo Alto Networks firewalls have per-category actions such as 'allow', 'alert', 'block', and 'override'. When set to 'alert', the firewall logs the URL category match but permits the traffic, which is often used for monitoring before enforcing a block. This is distinct from the rule-level action; the profile's action determines whether the traffic is allowed or denied after the rule match.
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.
Policy Evaluation and Management — This question tests Policy Evaluation and Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The URL Filtering profile is set to 'alert' instead of 'block' for the relevant categories. — Option D is correct because if the URL Filtering profile is set to 'alert' instead of 'block' for the relevant categories, the firewall will log the violation but still allow the traffic to pass. This means users can access blocked categories even though the rule is correctly applied, as the profile does not enforce a blocking action.
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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