- A
It translates all IP traffic from 10.1.1.0/24 to the IP address 192.168.1.1 using port address translation.
Correct. The 'ip nat inside source list 100 interface GigabitEthernet0/2 overload' command performs PAT, translating the inside network to the outside interface IP.
- B
It performs static NAT for the host 10.1.1.1 to 192.168.1.1.
Why wrong: Incorrect. Static NAT would require 'ip nat inside source static' commands, not an access list with overload.
- C
It translates all traffic from 192.168.1.0/24 to the IP address 10.1.1.1.
Why wrong: Incorrect. The inside network is 10.1.1.0/24, not 192.168.1.0/24. The outside interface is 192.168.1.1.
- D
It allows all IP traffic from any source to any destination without translation.
Why wrong: Incorrect. The access list permits only traffic from 10.1.1.0/24, and the NAT command translates it. It does not permit all traffic.
Quick Answer
The correct answer is that this configuration translates all IP traffic from the 10.1.1.0/24 network to the single IP address 192.168.1.1 using port address translation. This is the essence of NAT overload, also known as PAT, where the router multiplexes many inside local addresses to one outside global address by tracking unique source port numbers. On the ENCOR 350-401 exam, this scenario tests your understanding of how the "overload" keyword modifies the standard dynamic NAT behavior, enabling many hosts to share a single public IP. A common trap is confusing this with static NAT or forgetting that the access list defines the inside network, not the outside. The key memory tip is "overload equals port multiplexing," meaning the router uses the transport layer port to differentiate sessions, so a single outside interface IP can support thousands of simultaneous connections from the inside network.
CCNP REST APIs and Data Models Practice Question
This 350-401 practice question tests your understanding of rest apis and data models. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Examine the following configuration snippet applied to a Cisco IOS-XE device:
interface GigabitEthernet0/1 ip address 10.1.1.1 255.255.255.0 ip nat inside
!
interface GigabitEthernet0/2 ip address 192.168.1.1 255.255.255.0 ip nat outside
!
access-list 100 permit ip 10.1.1.0 0.0.0.255 any ip nat inside source list 100 interface GigabitEthernet0/2 overload
What is the effect of this configuration?
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
It translates all IP traffic from 10.1.1.0/24 to the IP address 192.168.1.1 using port address translation.
This is a standard NAT overload (PAT) configuration. The inside network 10.1.1.0/24 is translated to the IP address of the outside interface (GigabitEthernet0/2) with port multiplexing.
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.
- ✓
It translates all IP traffic from 10.1.1.0/24 to the IP address 192.168.1.1 using port address translation.
- ✗
It performs static NAT for the host 10.1.1.1 to 192.168.1.1.
Why it's wrong here
Incorrect. Static NAT would require 'ip nat inside source static' commands, not an access list with overload.
- ✗
It translates all traffic from 192.168.1.0/24 to the IP address 10.1.1.1.
Why it's wrong here
Incorrect. The inside network is 10.1.1.0/24, not 192.168.1.0/24. The outside interface is 192.168.1.1.
- ✗
It allows all IP traffic from any source to any destination without translation.
Why it's wrong here
Incorrect. The access list permits only traffic from 10.1.1.0/24, and the NAT command translates it. It does not permit all traffic.
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
Incorrect. Static NAT would require 'ip nat inside source static' commands, not an access list with overload.
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.
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FAQ
Questions learners often ask
What does this 350-401 question test?
REST APIs and Data Models — This question tests REST APIs and Data Models — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: It translates all IP traffic from 10.1.1.0/24 to the IP address 192.168.1.1 using port address translation. — This is a standard NAT overload (PAT) configuration. The inside network 10.1.1.0/24 is translated to the IP address of the outside interface (GigabitEthernet0/2) with port multiplexing.
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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Last reviewed: Jun 18, 2026
This 350-401 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 350-401 exam.
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