The answer is that the translation for 10.0.0.10 to 192.168.1.100 is a dynamic NAT without PAT. This is correct because the first two entries in the show ip nat translations output show only an inside local and inside global address with no protocol or port numbers, indicated by the dashes under the Pro column, which is the hallmark of a one-to-one dynamic NAT mapping. In contrast, the later entries include udp and tcp protocols with port numbers, revealing that PAT (Port Address Translation) is actively overloaded for those specific sessions. On the ENCOR 350-401 exam, this output tests your ability to distinguish between dynamic NAT and PAT by reading the translation table—a common trap is assuming all entries with inside global addresses use PAT, but the absence of a protocol column entry clearly signals a pure dynamic NAT translation. A quick memory tip: no protocol number means no port translation, so think “dash equals direct mapping.”
CCNP WAN Technologies Practice Question
This 350-401 practice question tests your understanding of wan technologies. 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 issues the following command on Router R6:
R6# show ip nat translations
Pro Inside global Inside local Outside local Outside global
--- 192.168.1.100 10.0.0.10 --- ---
--- 192.168.1.101 10.0.0.11 --- ---
udp 192.168.1.100:1234 10.0.0.10:1234 203.0.113.5:53 203.0.113.5:53
tcp 192.168.1.101:80 10.0.0.11:80 198.51.100.2:443 198.51.100.2:443
Based on this output, what is true about the NAT translations?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The translation for 10.0.0.10 to 192.168.1.100 is a dynamic NAT without PAT.
The output shows dynamic NAT translations with inside local and inside global addresses. The presence of protocol-specific translations (udp, tcp) indicates PAT (NAT overload) is in use for some traffic.
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.
✗
All translations are static NAT entries.
Why it's wrong here
Static NAT would show a consistent mapping; here we see dynamic translations with ports.
✓
The translation for 10.0.0.10 to 192.168.1.100 is a dynamic NAT without PAT.
Why this is correct
The first two entries have no protocol or port, indicating a simple one-to-one dynamic NAT. The later entries show PAT with ports.
Related concept
Static NAT maps one inside address to one outside address.
The outside global address is the same for all translations.
Why it's wrong here
Outside global addresses differ (203.0.113.5 and 198.51.100.2).
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
Static NAT would show a consistent mapping; here we see dynamic translations with ports.
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.
What to study next
Got this wrong? Here's your next step.
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 350-401 NAT questions on configuration and troubleshooting.
WAN Technologies — This question tests WAN Technologies — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The translation for 10.0.0.10 to 192.168.1.100 is a dynamic NAT without PAT. — The output shows dynamic NAT translations with inside local and inside global addresses. The presence of protocol-specific translations (udp, tcp) indicates PAT (NAT overload) is in use for some traffic.
What should I do if I get this 350-401 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 350-401 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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