- A
PAT is working correctly; translations are dynamic and overload is enabled.
The output shows dynamic mappings with overload, and translations are active. No errors or misses indicate proper operation.
- B
NAT is failing because the pool is exhausted.
Why wrong: The pool has 16 addresses, and only 3 are used. Exhaustion is not indicated.
- C
Static NAT is configured, but dynamic NAT is not working.
Why wrong: The statistics show 0 static translations and 3 dynamic. Static NAT is not configured.
- D
The inside and outside interfaces are reversed.
Why wrong: The interfaces are correctly listed: GigabitEthernet0/0 as inside, GigabitEthernet0/1 as outside.
Question 588 of 2,152
Show IP NAT Translations
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 --- --- --- 192.0.2.11 10.0.0.11 --- --- --- 192.0.2.12 10.0.0.12 --- ---
R1# show ip nat statistics
Total active translations: 3 (0 static, 3 dynamic; 3 extended) Outside interfaces: GigabitEthernet0/1 Inside interfaces: GigabitEthernet0/0 Hits: 45 Misses: 0 CEF Translated packets: 45, 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 3 map-id 1 overload
[Id] ip nat inside source list ACL1 pool POOL1 overload
refcount 3
Based on this output, which statement is correct?
Quick Answer
The correct answer is that PAT is working correctly, as confirmed by the dynamic translations and the overload keyword in the output. This is because the show ip nat translations command displays three inside global addresses (192.0.2.10–12) mapped to three inside local addresses, while the show ip nat statistics output reveals that these are dynamic mappings using the POOL1 pool with overload enabled. The pool contains 16 addresses, but only three translations are active, and the protocol column shows dashes, which is normal for PAT when each inside global is used by a single host—no port multiplexing is needed yet. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your ability to distinguish between static NAT, dynamic NAT, and PAT by reading the output carefully; a common trap is assuming dashes in the protocol column indicate a problem, when in fact they simply mean no TCP or UDP port entry is required. Remember the memory tip: “Dashes don’t mean disaster—overload means PAT is the master.”
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
✓
PAT is working correctly; translations are dynamic and overload is enabled.
The output shows three dynamic translations from the inside local addresses (10.0.0.10–12) to inside global addresses (192.0.2.10–12) using the pool POOL1 (192.0.2.10–20). The 'overload' keyword in the NAT configuration enables Port Address Translation (PAT), allowing multiple inside hosts to share a single global IP by using unique port numbers. The 'refcount 3' and the presence of three active translations confirm that PAT is working correctly.
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.
- ✓
PAT is working correctly; translations are dynamic and overload is enabled.
Why this is correct
The output shows dynamic mappings with overload, and translations are active. No errors or misses indicate proper operation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
NAT is failing because the pool is exhausted.
Why it's wrong here
The pool has 16 addresses, and only 3 are used. Exhaustion is not indicated.
- ✗
Static NAT is configured, but dynamic NAT is not working.
Why it's wrong here
The statistics show 0 static translations and 3 dynamic. Static NAT is not configured.
- ✗
The inside and outside interfaces are reversed.
Why it's wrong here
The interfaces are correctly listed: GigabitEthernet0/0 as inside, GigabitEthernet0/1 as outside.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that 'overload' always forces all hosts to share a single IP address, but in reality, PAT will first assign unique IPs from the pool if available, and only reuse IPs with port differentiation when the pool is exhausted.
Trap categories for this question
Command / output trap
The statistics show 0 static translations and 3 dynamic. Static NAT is not configured.
Detailed technical explanation
How to think about this question
PAT (overload) works by multiplexing multiple inside hosts through a single global IP address using Layer 4 port numbers (TCP/UDP). The router maintains a translation table that maps each inside local address:port to a unique inside global address:port, allowing up to ~65,000 simultaneous sessions per global IP. In this scenario, the three inside hosts are each assigned a unique global IP from the pool (192.0.2.10, .11, .12) because the pool has enough addresses; if the pool were smaller, PAT would reuse the same global IP with different port numbers.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
NAT and PAT — study guide chapter
Learn the concepts, then practise the questions
- →
NAT and PAT practice questions
Targeted practice on this topic area only
- →
All 300-410 questions
2,152 questions across all exam domains
- →
Cisco CCNP ENARSI 300-410 study guide
Full concept coverage aligned to exam objectives
- →
300-410 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 300-410 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Layer 3 Technologies practice questions
Practise 300-410 questions linked to Layer 3 Technologies.
EIGRP Troubleshooting practice questions
Practise 300-410 questions linked to EIGRP Troubleshooting.
OSPF Troubleshooting (v2/v3) practice questions
Practise 300-410 questions linked to OSPF Troubleshooting (v2/v3).
BGP Troubleshooting practice questions
Practise 300-410 questions linked to BGP Troubleshooting.
Route Redistribution practice questions
Practise 300-410 questions linked to Route Redistribution.
Policy-Based Routing (PBR) practice questions
Practise 300-410 questions linked to Policy-Based Routing (PBR).
VRF-Lite practice questions
Practise 300-410 questions linked to VRF-Lite.
Route Maps and Route Filtering practice questions
Practise 300-410 questions linked to Route Maps and Route Filtering.
Administrative Distance practice questions
Practise 300-410 questions linked to Administrative Distance.
Route Summarization practice questions
Practise 300-410 questions linked to Route Summarization.
Bidirectional Forwarding Detection (BFD) practice questions
Practise 300-410 questions linked to Bidirectional Forwarding Detection (BFD).
VPN Technologies practice questions
Practise 300-410 questions linked to VPN Technologies.
Practice this exam
Start a free 300-410 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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: PAT is working correctly; translations are dynamic and overload is enabled. — The output shows three dynamic translations from the inside local addresses (10.0.0.10–12) to inside global addresses (192.0.2.10–12) using the pool POOL1 (192.0.2.10–20). The 'overload' keyword in the NAT configuration enables Port Address Translation (PAT), allowing multiple inside hosts to share a single global IP by using unique port numbers. The 'refcount 3' and the presence of three active translations confirm that PAT is working correctly.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More 300-410 practice questions
- Drag and drop the steps to negotiate an IKEv2 IPsec site-to-site tunnel into the correct order, from first to last.
- Drag and drop the steps to troubleshoot an IPsec site-to-site VPN adjacency failure into the correct order, from first t…
- Drag and drop the steps to verify and validate the operational state of an IPsec site-to-site VPN into the correct order…
- Consider the following configuration snippet: ip cef ! interface GigabitEthernet0/0 ip address 10.0.0.1 255.255.255.25…
- A router is configured with 'logging host 10.1.1.100' and 'logging trap informational'. The engineer notices that syslog…
- Drag and drop the steps to configure a GRE tunnel for IPv6 over IPv4 into the correct order, from first to last.
Last reviewed: Jul 4, 2026
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.