PCNSA Policy Evaluation and Management Practice Question
An administrator has configured a security rule that allows traffic from the 'Trust' zone to the 'Untrust' zone for specific applications. The rule is placed at position 5 in the rulebase. A user reports that traffic matching this rule is being denied. Upon inspection, the administrator finds that a rule at position 3 denies all traffic from 'Trust' to 'Untrust' for any application. What is the most likely cause of the denial?
⚠ Common exam trap
The trap here is assuming that a more specific allow rule will be evaluated before a broader deny rule, but rule order is strictly sequential.
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 rule at position 3 is evaluated first and matches the traffic, so the deny action is applied.
Security rules are processed in order from top to bottom, and the first rule that matches the traffic determines the action. Because the deny rule at position 3 matches all Trust-to-Untrust traffic, it takes precedence over the allow rule at position 5. To resolve this, the administrator should move the allow rule above the deny rule or modify the deny rule to be more specific.
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 rule at position 3 is evaluated first and matches the traffic, so the deny action is applied.
Why this is correct
Security rules are evaluated top-down, and the first match is applied. The rule at position 3 denies all Trust-to-Untrust traffic, so any traffic from Trust to Untrust will match that rule before reaching the allow rule at position 5. Therefore, the traffic is denied.
- ✗
The rule at position 5 is not correctly configured with the appropriate applications.
Why it's wrong here
The scenario states that the rule allows specific applications, and the user's traffic is being denied. Even if the applications were misconfigured, the deny rule at position 3 would still match and deny the traffic first. The issue is rule order, not application configuration.
- ✗
The deny rule at position 3 is a default rule and cannot be overridden by any other rule.
Why it's wrong here
There is no default deny rule at position 3; the default rules are typically at the bottom of the rulebase (interzone and intrazone). A deny rule placed at position 3 is a custom rule, and it can be overridden by placing an allow rule above it, but here it is above the allow rule.
- ✗
The firewall requires a security profile to be attached to the allow rule for it to take effect.
Why it's wrong here
Security profiles are not required for a rule to allow traffic; they provide additional inspection and can block threats within allowed traffic. The absence of a security profile would not cause the rule to be bypassed or the traffic to be denied by a later rule.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Palo Alto Networks exam blueprint
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.