- A
PAT is working correctly; multiple inside hosts share the same global address with unique ports.
The translations show different source ports for each inside host, and the mapping uses interface overload. Hits indicate successful translation.
- B
The NAT pool is exhausted because all addresses are used.
Why wrong: Only one global address is used (the interface address), and PAT allows sharing.
- C
Static NAT is configured for DNS traffic.
Why wrong: No static translations are present.
- D
The inside and outside interfaces are swapped.
Why wrong: The statistics show correct interface assignment.
Question 1,829 of 2,152
How to Read Show IP NAT Translations for Working PAT
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 udp 192.0.2.10:10000 10.0.0.10:10000 203.0.113.5:53 203.0.113.5:53 udp 192.0.2.10:10001 10.0.0.11:10000 203.0.113.5:53 203.0.113.5:53 udp 192.0.2.10:10002 10.0.0.12:10000 203.0.113.5:53 203.0.113.5:53
R1# show ip nat statistics
Total active translations: 3 (0 static, 3 dynamic; 3 extended) Outside interfaces: GigabitEthernet0/1 Inside interfaces: GigabitEthernet0/0 Hits: 150 Misses: 0 CEF Translated packets: 150, CEF Punted packets: 0 Expired translations: 0 Dynamic mappings: -- Inside Source
[Id] ip nat inside source list ACL1 interface GigabitEthernet0/1 overload
refcount 3
Based on this output, which statement is correct?
Quick Answer
The correct answer is that PAT is working correctly, as multiple inside hosts share the same global address with unique ports. This output demonstrates proper Port Address Translation because three different inside local addresses (10.0.0.10, 10.0.0.11, and 10.0.0.12) all map to the single inside global address 192.0.2.10, each distinguished by a unique source port (10000, 10001, 10002). The outside local and outside global columns are identical, confirming that only the source is being translated, which is standard PAT behavior. On the CCNP ENARSI 300-410 exam, this scenario tests your ability to verify PAT operation from the show ip nat translations output, often paired with the show ip nat statistics command to confirm hits and no misses. A common trap is confusing PAT with static NAT—remember that PAT always shows extended translations with unique ports, while static NAT shows a 1:1 mapping without port differentiation. Memory tip: “PAT = Ports Are Translated” — if you see multiple inside locals sharing one global IP with different ports, PAT is working.
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; multiple inside hosts share the same global address with unique ports.
The output shows three dynamic NAT translations, all using the same inside global address 192.0.2.10 with unique source ports (10000, 10001, 10002). This is the hallmark of Port Address Translation (PAT) or NAT overload, where multiple inside hosts (10.0.0.10, 10.0.0.11, 10.0.0.12) share a single public IP address by differentiating sessions via layer-4 port numbers. The 'overload' keyword in the dynamic mapping confirms PAT is active and 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; multiple inside hosts share the same global address with unique ports.
Why this is correct
The translations show different source ports for each inside host, and the mapping uses interface overload. Hits indicate successful translation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The NAT pool is exhausted because all addresses are used.
Why it's wrong here
Only one global address is used (the interface address), and PAT allows sharing.
- ✗
Static NAT is configured for DNS traffic.
Why it's wrong here
No static translations are present.
- ✗
The inside and outside interfaces are swapped.
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 distinction between PAT (overload) and basic NAT (pool without overload), and candidates may mistakenly think that multiple translations to the same destination (203.0.113.5:53) indicate a pool exhaustion or static NAT, when in fact the unique source ports confirm PAT is functioning correctly.
Trap categories for this question
Command / output trap
The statistics show correct interface assignment.
Detailed technical explanation
How to think about this question
PAT (RFC 3022) extends basic NAT by multiplexing thousands of internal hosts through a single public IP using 16-bit source port numbers (0–65535). The 'show ip nat statistics' output confirms 'overload' is configured on the outside interface, and the 'refcount 3' indicates three active translations using that interface. In real-world scenarios, DNS traffic (UDP/53) is often the first to trigger PAT, as seen here, but any protocol can be translated; the router maintains a translation table to demultiplex return traffic.
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; multiple inside hosts share the same global address with unique ports. — The output shows three dynamic NAT translations, all using the same inside global address 192.0.2.10 with unique source ports (10000, 10001, 10002). This is the hallmark of Port Address Translation (PAT) or NAT overload, where multiple inside hosts (10.0.0.10, 10.0.0.11, 10.0.0.12) share a single public IP address by differentiating sessions via layer-4 port numbers. The 'overload' keyword in the dynamic mapping confirms PAT is active and 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.