This PCNSE practice question tests your understanding of troubleshoot. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 wants to verify if a specific internal IP address (10.1.1.100) is being translated to a public IP when accessing the internet. Which CLI command should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
show session all filter source 10.1.1.100
Option C is correct because 'show session all filter source 10.1.1.100' will display all sessions originating from that IP, including NAT translations. Option A shows NAT rules but not active translations. Option B shows the running configuration of NAT rules. Option D shows addresses but not active translations.
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.
✗
show running nat-policy
Why it's wrong here
This shows the NAT policy configuration, not current translations.
✓
show session all filter source 10.1.1.100
Why this is correct
This command displays all active sessions from the specified source, including NAT source and destination translations.
Related concept
Static NAT maps one inside address to one outside address.
✗
show nat rule
Why it's wrong here
This command shows NAT policy rules, not active sessions or translations.
✗
show address 10.1.1.100
Why it's wrong here
This is not a valid command; showing an address is not a standard CLI command on Palo Alto firewalls.
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.
Trap categories for this question
Command / output trap
This shows the NAT policy configuration, not current translations.
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 PCNSE NAT questions on configuration and troubleshooting.
Troubleshoot — This question tests Troubleshoot — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: show session all filter source 10.1.1.100 — Option C is correct because 'show session all filter source 10.1.1.100' will display all sessions originating from that IP, including NAT translations. Option A shows NAT rules but not active translations. Option B shows the running configuration of NAT rules. Option D shows addresses but not active translations.
What should I do if I get this PCNSE 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 PCNSE 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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