350-401 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.
A network engineer is using the Cisco IOS-XE REST API to configure a static route. The engineer sends a PATCH request to 'https://device/restconf/data/Cisco-IOS-XE-native:native/ip/route/ip-route-interface-forwarding-list=192.168.1.0,255.255.255.0,GigabitEthernet1' with a JSON payload containing the route details. The device responds with a 204 No Content status. What does this response indicate?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The request was successful, and the static route has been configured.
A 204 No Content response indicates that the request was successful, but there is no content to return. In RESTCONF, a successful PATCH request that updates an existing resource typically returns 204 No Content. The engineer should verify that the route was applied by retrieving the configuration.
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.
✓
The request was successful, and the static route has been configured.
Why this is correct
Correct because 204 No Content indicates success with no response body; the route is configured.
Related concept
Static NAT maps one inside address to one outside address.
✗
The request failed because the route already exists; the engineer must use PUT instead.
Why it's wrong here
Incorrect because 204 indicates success, not failure; a conflict would return 409.
✗
The device does not support PATCH; the engineer must use POST to update the route.
Why it's wrong here
Incorrect because PATCH is supported for partial updates; 204 indicates success.
✗
The payload was empty; the engineer must include the route parameters in the body.
Why it's wrong here
Incorrect because if the payload were empty, the request would likely fail with a 400 error.
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.
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 350-401 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 350-401 NAT questions on configuration and troubleshooting.
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: The request was successful, and the static route has been configured. — A 204 No Content response indicates that the request was successful, but there is no content to return. In RESTCONF, a successful PATCH request that updates an existing resource typically returns 204 No Content. The engineer should verify that the route was applied by retrieving the configuration.
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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Question Discussion
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