mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
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?
⚠ Common exam trap
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.
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.
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.
- ✗
The NAT pool is exhausted.
Why it's wrong here
Only one address is used out of 16.
- ✗
PAT is misconfigured.
Why it's wrong here
PAT is not configured; this is basic NAT.
- ✗
The inside and outside interfaces are reversed.
Why it's wrong here
The statistics show correct interface assignment.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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