mediumMultiple ChoiceObjective-mapped
200-901 An engineer configures a trunk port as shown Practice Question
Exhibit
Refer to the exhibit. ``` interface GigabitEthernet0/1 switchport mode trunk switchport trunk native vlan 99 switchport trunk allowed vlan 10,20,30 ```
An engineer configures a trunk port as shown. A device connected to this port sends an untagged frame. Which VLAN will the switch associate the frame with?
⚠ Common exam trap
Cisco often tests the misconception that untagged frames on a trunk are dropped or that the native VLAN is always VLAN 1, leading candidates to overlook the explicit native VLAN 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
✓
VLAN 99
The switchport trunk native vlan 99 command configures VLAN 99 as the native VLAN for the trunk port. When an untagged frame arrives on a trunk port, the switch associates it with the native VLAN. Therefore, the frame is placed into VLAN 99.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
VLAN 1
Why it's wrong here
Native VLAN is configured as 99.
- ✗
The frame is dropped
Why it's wrong here
Untagged frames are accepted on trunk.
- ✗
VLAN 10
Why it's wrong here
Only tagged frames use allowed VLANs.
- ✓
VLAN 99
Why this is correct
Untagged frames are placed in native VLAN.
Visual reference
Go deeper
Related to this question
About these practice questions
One of 989 original 200-901 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 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 200-901 exam.