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.
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
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
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 PAT translations using the interface address (192.0.2.10) with unique source ports (10000, 10001, 10002). This is correct PAT operation. The statistics show hits and no misses, indicating proper function.
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.
✓
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
Static NAT maps one inside address to one outside address.
✗
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: 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
The statistics show correct interface assignment.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
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 300-410 NAT questions on configuration and troubleshooting.
NAT and PAT — This question tests NAT and PAT — Static NAT maps one inside address to one outside address..
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 PAT translations using the interface address (192.0.2.10) with unique source ports (10000, 10001, 10002). This is correct PAT operation. The statistics show hits and no misses, indicating proper function.
What should I do if I get this 300-410 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 300-410 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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 →
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.
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.