PCNSA Device Management and Services Practice Question
This PCNSA practice question tests your understanding of device management and services. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A network administrator notices that a specific user behind a PA-820 firewall is unable to reach a critical SaaS application, while other users can access it without issues. The administrator checks the traffic logs and sees the session is being denied. Which step should the administrator take next to identify the root cause?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Check the Traffic log with the session's source IP and destination
Option D is correct because the Traffic log already shows the session is denied, and filtering by the specific user's source IP and the destination SaaS application will reveal the exact security policy or rule that is blocking the traffic. This allows the administrator to identify whether the issue is due to a misconfigured policy, an application override, or a user-specific rule, rather than a global or interface-level problem.
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.
✗
Check the System log for related entries
Why it's wrong here
System log records admin actions, not traffic denials.
✗
Run a packet capture on the ingress interface
Why it's wrong here
Packet capture is more detailed and typically used after identifying a potential issue in the logs.
✗
Check the global counters for dropped packets
Why it's wrong here
Global counters show aggregate drops, not per-session details.
✓
Check the Traffic log with the session's source IP and destination
Why this is correct
Traffic log shows the rule that matched and the action taken.
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 may jump to packet capture or system logs without first using the Traffic log's filtering capabilities to pinpoint the exact security rule causing the deny, wasting time on broad diagnostics.
Trap categories for this question
Command / output trap
Global counters show aggregate drops, not per-session details.
Detailed technical explanation
How to think about this question
The Traffic log in PAN-OS records every session attempt with fields such as source IP, destination IP, application, action (allow/deny), and the specific security rule that matched. By filtering the Traffic log with the user's source IP and the SaaS application's destination, the administrator can directly see the rule ID and reason for denial (e.g., 'deny' action from a security policy, or application mismatch). This approach leverages the firewall's session-based logging, which is designed for per-flow troubleshooting, unlike global counters or system logs that aggregate data.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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.
Device Management and Services — This question tests Device Management and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Check the Traffic log with the session's source IP and destination — Option D is correct because the Traffic log already shows the session is denied, and filtering by the specific user's source IP and the destination SaaS application will reveal the exact security policy or rule that is blocking the traffic. This allows the administrator to identify whether the issue is due to a misconfigured policy, an application override, or a user-specific rule, rather than a global or interface-level problem.
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.
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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