PCNSA Device Management and Services Practice Question
Exhibit
rulebase security rules
{
"rule1" : {
"action" : "allow",
"source" : [ "192.168.1.0/24" ],
"destination" : [ "10.0.0.0/8" ],
"application" : [ "web-browsing" ],
"service" : [ "application-default" ]
}
}Refer to the exhibit. The administrator notices that traffic from 192.168.1.100 to 10.1.1.1 using HTTPS is being blocked. What is the most likely cause?
⚠ Common exam trap
Palo Alto Networks often tests the misconception that allowing a port (TCP/443) is sufficient to permit HTTPS traffic, but in Palo Alto firewalls, the application must also be explicitly allowed in the rule.
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 application is web-browsing, but HTTPS uses ssl application.
The exhibit shows a security policy rule that allows 'web-browsing' application traffic. HTTPS traffic uses the 'ssl' application, not 'web-browsing'. Since the rule's application match is set to 'web-browsing', it does not match HTTPS sessions, causing them to be blocked by the implicit deny rule at the end of the policy.
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 source IP is not in the range.
Why it's wrong here
Source IP 192.168.1.100 is within 192.168.1.0/24.
- ✗
The destination is in 10.0.0.0/8 but the policy is missing service TCP/443.
Why it's wrong here
No need to specify service separately when using application-default.
- ✗
The rule is not committed.
Why it's wrong here
Possible but less specific; application mismatch is more likely.
- ✓
The application is web-browsing, but HTTPS uses ssl application.
Why this is correct
HTTPS uses ssl application, not web-browsing.
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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.