PCNSA App-ID and Content-ID Practice Question
Exhibit
security rule configuration:
{
"name": "rule1",
"from": ["trust"],
"to": ["untrust"],
"source": ["any"],
"destination": ["any"],
"application": ["web-browsing", "ssl"],
"action": "allow"
}Refer to the exhibit. An administrator notes that traffic to Facebook is being denied. What is the most likely reason?
⚠ Common exam trap
Palo Alto Networks often tests the misconception that SSL decryption is necessary to identify or control encrypted applications, but App-ID can identify many encrypted applications using non-decryption methods like SNI and JA3.
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
✓
Facebook is not in the allowed applications list.
The exhibit shows a security policy rule with an 'allowed applications' list that does not include Facebook. Since App-ID identifies Facebook traffic by its application signature, any traffic matching this rule will be denied unless Facebook is explicitly allowed. Option D is correct because the absence of Facebook in the allowed applications list causes the firewall to block the traffic.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
SSL decryption is not configured.
Why it's wrong here
SSL decryption would not cause blocking of non-decrypted traffic.
- ✗
The profile group is blocking Facebook.
Why it's wrong here
No profile group is configured in the rule.
- ✗
The rule order is incorrect.
Why it's wrong here
Without additional rules, this rule would match all traffic, but Facebook is not in the application list.
- ✓
Facebook is not in the allowed applications list.
Why this is correct
The rule only allows web-browsing and ssl; Facebook is a different application.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.