The answer is that the script will set the description of GigabitEthernet1/0/1 to 'Configured via RESTCONF'. This is correct because the PUT method in RESTCONF is used to create or replace the entire target resource, and here the payload includes the description field under the Cisco-IOS-XE-native YANG model for the interface. When you modify an interface description via RESTCONF, you send a PUT request to the specific interface’s URI, and the server overwrites the existing configuration with the provided data, including the new description. On the ENCOR 350-401 exam, this tests your understanding of RESTCONF operations and YANG data models, often appearing in automation or programmability questions where you must distinguish between PUT (full replacement) and PATCH (partial update). A common trap is confusing PUT with PATCH—remember that PUT replaces the entire resource, so you must include all mandatory fields. Memory tip: “PUT puts the whole thing in place, PATCH patches just the change.”
CCNP Python for Network Automation Practice Question
This 350-401 practice question tests your understanding of python for network automation. 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.
Review the following Python script that uses the Cisco IOS-XE RESTCONF API to modify an interface:
```python
import requests
from requests.auth import HTTPBasicAuth
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It will set the description of GigabitEthernet1/0/1 to 'Configured via RESTCONF'.
A PUT request to the interface URL with a payload that includes a description will update the interface description.
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 will create a new interface named GigabitEthernet1/0/1.
Why it's wrong here
The interface already exists; PUT updates the existing resource.
✓
It will set the description of GigabitEthernet1/0/1 to 'Configured via RESTCONF'.
Why this is correct
The PUT request updates the interface configuration with the provided description.
Related concept
Static NAT maps one inside address to one outside address.
✗
It will delete the interface configuration.
Why it's wrong here
A DELETE method would be required to delete the interface.
✗
It will return an error because the payload is missing required fields.
Why it's wrong here
The payload is valid for updating the description; only the description is being modified.
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.
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.
Python for Network Automation — This question tests Python for Network Automation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: It will set the description of GigabitEthernet1/0/1 to 'Configured via RESTCONF'. — A PUT request to the interface URL with a payload that includes a description will update the interface description.
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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