- A
The NAT translation exists but no traffic is being translated (0 hits, 0 misses), indicating a possible idle translation or no matching traffic.
The translation is present but no packets have been processed. This could be a stale entry or lack of traffic.
- B
The NAT pool is exhausted.
Why wrong: Only one address is used out of 16.
- C
PAT is misconfigured.
Why wrong: PAT is not configured; this is basic NAT.
- D
The inside and outside interfaces are reversed.
Why wrong: The statistics show correct interface assignment.
Question 2,111 of 2,152
300-410 NAT and PAT Practice Question
This 300-410 practice question tests your understanding of nat and pat. 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 engineer runs the following command on Router R1:
R1# show ip nat translations
Pro Inside global Inside local Outside local Outside global --- 192.0.2.10 10.0.0.10 --- ---
R1# show ip nat statistics
Total active translations: 1 (0 static, 1 dynamic; 0 extended) Outside interfaces: GigabitEthernet0/1 Inside interfaces: GigabitEthernet0/0 Hits: 0 Misses: 0 CEF Translated packets: 0, CEF Punted packets: 0 Expired translations: 0 Dynamic mappings: -- Inside Source
[Id] ip nat pool POOL1 192.0.2.10 192.0.2.20 netmask 255.255.255.240
refcount 1 map-id 1
[Id] ip nat inside source list ACL1 pool POOL1
refcount 1
Based on this output, what is the problem?
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 NAT translation exists but no traffic is being translated (0 hits, 0 misses), indicating a possible idle translation or no matching traffic.
The output shows a single dynamic NAT translation with zero hits and zero misses, meaning no traffic has attempted to traverse the NAT process. This indicates the translation entry exists (likely from a previous or idle session) but no packets have matched the access list or triggered translation since the counters were cleared. The problem is that the NAT configuration is in place but not actively translating any traffic.
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.
- ✓
The NAT translation exists but no traffic is being translated (0 hits, 0 misses), indicating a possible idle translation or no matching traffic.
Why this is correct
The translation is present but no packets have been processed. This could be a stale entry or lack of traffic.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The NAT pool is exhausted.
Why it's wrong here
Only one address is used out of 16.
- ✗
PAT is misconfigured.
- ✗
The inside and outside interfaces are reversed.
Why it's wrong here
The statistics show correct interface assignment.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that a static translation entry in the NAT table implies active traffic flow, but the 'Hits: 0' counter reveals no packets have been translated, indicating the translation is idle or the ACL is not matching traffic.
Trap categories for this question
Command / output trap
The statistics show correct interface assignment.
Detailed technical explanation
How to think about this question
Under the hood, the 'Hits' counter increments each time a packet matches the NAT access list and a translation is created or used; 'Misses' increment when a packet requires a new translation but no pool address is available. Here, both are zero, meaning no traffic has ever matched ACL1 or triggered a NAT event. In real-world scenarios, this often occurs when the access list (ACL1) does not match the source traffic, or when routing is misconfigured so packets never reach the inside interface for translation.
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.
Visual reference
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this 300-410 question test?
NAT and PAT — This question tests NAT and PAT — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The NAT translation exists but no traffic is being translated (0 hits, 0 misses), indicating a possible idle translation or no matching traffic. — The output shows a single dynamic NAT translation with zero hits and zero misses, meaning no traffic has attempted to traverse the NAT process. This indicates the translation entry exists (likely from a previous or idle session) but no packets have matched the access list or triggered translation since the counters were cleared. The problem is that the NAT configuration is in place but not actively translating any traffic.
What should I do if I get this 300-410 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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Last reviewed: Jul 4, 2026
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