- A
The translation is for a single port only.
Why wrong: Extended means multiple ports or sessions are being multiplexed.
- B
The translation includes port information, typical of PAT.
Extended NAT entries include protocol and port numbers for PAT.
- C
The translation is static and never times out.
Why wrong: Static entries have the 'static' flag.
- D
The translation is for a VPN tunnel.
Why wrong: No indication of VPN.
Question 1,584 of 2,152
What Does the 'Extended' Flag Mean in Show IP NAT Translations Verbose?
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 to verify NAT translations:
R1# show ip nat translations verbose
Pro Inside global Inside local Outside local Outside global --- 10.2.2.2 10.1.1.1 192.168.1.1 192.168.1.1 create 00:00:15, use 00:00:05, flags: extended, timing-out
What does the 'extended' flag indicate?
Quick Answer
The answer is that the 'extended' flag indicates the translation includes port information, typical of Port Address Translation (PAT). This flag appears in the output of show ip nat translations verbose when the NAT entry is using a combination of IP address and Layer 4 port numbers to map multiple inside local addresses to a single inside global address, rather than a simple one-to-one static mapping. On the Cisco CCNP ENARSI 300-410 exam, this tests your ability to interpret NAT operational details and distinguish between dynamic NAT and PAT; a common trap is confusing 'extended' with 'static' or assuming it means the translation is for an extended ACL. Remember the memory tip: "Extended equals ports" — if you see the extended flag, think of PAT multiplexing many internal hosts through one public IP by tracking their unique port numbers.
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 translation includes port information, typical of PAT.
The 'extended' flag in the output of 'show ip nat translations verbose' indicates that the NAT translation includes Layer 4 port information, which is characteristic of Port Address Translation (PAT) or NAT overload. This allows multiple internal hosts to share a single public IP address by using unique port numbers, as opposed to a simple one-to-one translation without port multiplexing.
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 translation is for a single port only.
Why it's wrong here
Extended means multiple ports or sessions are being multiplexed.
- ✓
The translation includes port information, typical of PAT.
- ✗
The translation is static and never times out.
Why it's wrong here
Static entries have the 'static' flag.
- ✗
The translation is for a VPN tunnel.
Why it's wrong here
No indication of VPN.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the 'extended' flag with static NAT or assume it means a single-port translation, when in fact it specifically denotes PAT with port multiplexing, as seen in dynamic overload configurations.
Detailed technical explanation
How to think about this question
Under the hood, the 'extended' flag corresponds to NAT entries that use the 'ip nat inside source list' command with the 'overload' keyword, enabling PAT. This flag is set when the translation table tracks both IP addresses and TCP/UDP ports, allowing the router to demultiplex return traffic. In real-world scenarios, this is critical for conserving public IP addresses in enterprise networks, where thousands of internal hosts may share a single external interface IP.
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
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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 translation includes port information, typical of PAT. — The 'extended' flag in the output of 'show ip nat translations verbose' indicates that the NAT translation includes Layer 4 port information, which is characteristic of Port Address Translation (PAT) or NAT overload. This allows multiple internal hosts to share a single public IP address by using unique port numbers, as opposed to a simple one-to-one translation without port multiplexing.
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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