The answer is VLAN 10. This is correct because the RESTCONF GET response for GigabitEthernet1/0/1 explicitly includes the 'native-vlan' field set to 10 within the 'Cisco-IOS-XE-native:interface' hierarchy, which directly reflects the access-mode VLAN assignment on Cisco IOS-XE devices. For the Cisco DevNet Associate 200-901 exam, this tests your ability to parse RESTCONF JSON responses and understand that the native VLAN is the default VLAN for untagged traffic on an access port. A common trap is confusing the 'native-vlan' with a trunk's allowed VLAN list or assuming the VLAN ID is buried in a different namespace—remember, RESTCONF uses YANG models, so the field name and hierarchy are predictable. Memory tip: "Native VLAN is the one that's 'native' to the interface, not the trunk—look for the 'native-vlan' key right under the interface's native model."
200-901 Cisco Platforms and Development Practice Question
This 200-901 practice question tests your understanding of cisco platforms and development. 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.
Refer to the exhibit. A Python script using RESTCONF sends a GET request to retrieve the interface configuration. The response is shown. What is the VLAN assigned to GigabitEthernet1/0/1?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
10
The correct answer is A (VLAN 10) because the RESTCONF GET response shows the native VLAN for GigabitEthernet1/0/1 is set to 10. In Cisco IOS-XE, the native VLAN is the VLAN assigned to an interface when it is in access mode, and the response explicitly includes the 'native-vlan' field with a value of 10 under the 'Cisco-IOS-XE-native:interface' hierarchy.
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.
Common exam trap: answer the scenario, not the keyword
Cisco often tests whether candidates can distinguish between the 'native-vlan' field (which represents the access VLAN for an access port) and the default VLAN 1, leading many to incorrectly select VLAN 1 when the response clearly shows a different value.
Trap categories for this question
Command / output trap
The exhibit shows vlan 10.
Detailed technical explanation
How to think about this question
RESTCONF uses YANG data models (e.g., Cisco-IOS-XE-native) to represent interface configurations. The 'native-vlan' field in the response corresponds to the 'switchport access vlan' command in CLI, which assigns the interface to a specific VLAN in access mode. Under the hood, RESTCONF translates the YANG model to JSON/XML, and the 'native-vlan' value directly maps to the VLAN ID used for untagged traffic on that port. In real-world scenarios, misreading the 'native-vlan' field as the default VLAN (1) is a common pitfall when candidates confuse access VLANs with trunk native VLANs.
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 help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cisco Platforms and Development — This question tests Cisco Platforms and Development — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 10 — The correct answer is A (VLAN 10) because the RESTCONF GET response shows the native VLAN for GigabitEthernet1/0/1 is set to 10. In Cisco IOS-XE, the native VLAN is the VLAN assigned to an interface when it is in access mode, and the response explicitly includes the 'native-vlan' field with a value of 10 under the 'Cisco-IOS-XE-native:interface' hierarchy.
What should I do if I get this 200-901 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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Question Discussion
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