PCNSA Policy Evaluation and Management Practice Question
This PCNSA practice question tests your understanding of policy evaluation and management. 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.
An administrator is troubleshooting why a rule is not being hit. The rule has source zone Trust, destination zone Untrust, source address 10.0.0.0/8, destination address any, application web-browsing, action allow, and log at session end. The traffic is coming from 10.1.1.1 to 1.2.3.4 on port 80, zone Trust to Untrust. The rule count shows zero hits. What could be the issue?
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 incorrectly identified; perhaps the traffic is using a different app.
Option C is correct because the rule specifically allows web-browsing; if the traffic is classified as a different application, it won't match. Option A is not an issue; destination any is fine. Option B is not needed. Option D is false; log setting does not affect hit count.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 application must be set to 'any'.
Why it's wrong here
Setting application 'any' would be less specific, not required.
✓
The application is incorrectly identified; perhaps the traffic is using a different app.
Why this is correct
If the firewall classifies the traffic as another application, the rule won't match.
Related concept
Static NAT maps one inside address to one outside address.
✗
The log setting is preventing hits.
Why it's wrong here
Logging does not affect rule matching.
✗
The destination address is too broad.
Why it's wrong here
Broad destination does not prevent hits.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCNSA NAT questions on configuration and troubleshooting.
Policy Evaluation and Management — This question tests Policy Evaluation and Management — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The application is incorrectly identified; perhaps the traffic is using a different app. — Option C is correct because the rule specifically allows web-browsing; if the traffic is classified as a different application, it won't match. Option A is not an issue; destination any is fine. Option B is not needed. Option D is false; log setting does not affect hit count.
What should I do if I get this PCNSA question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCNSA NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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