mediumMultiple ChoiceObjective-mapped
CCNP DTP Practice Question
A network engineer runs the following command on Switch SW1:
SW1# show dtp interface gi0/1
DTP information on GigabitEthernet0/1: DTP: Enabled DTP mode: Desirable DTP negotiate: TRUE DTP status: Trunk DTP trunk status: Trunking DTP timer: 30 DTP max-age: 2 DTP encapsulation: 802.1q DTP refresh rate: Both DTP requests: 10 DTP errors: 0
Based on this output, what can be concluded?
⚠ Common exam trap
A common misconception is that dynamic desirable only forms a trunk with trunk or other desirable interfaces, but it can also form a trunk with dynamic auto. Additionally, the output indicates the link is already trunking, so statements about future trunk formation are not directly concluded.
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
✓
The interface will not form a trunk unless the neighbor is set to trunk or desirable.
The output shows DTP is enabled, mode is 'Desirable', and the interface is already trunking with 802.1q encapsulation. Option A is incorrect because the interface is trunking, not in access mode. Option B is incorrect because dynamic desirable can form a trunk with dynamic auto as well as trunk or desirable modes; the statement that it 'will not form a trunk unless the neighbor is set to trunk or desirable' is false. Option C is incorrect because encapsulation is 802.1q, not ISL. Option D is incorrect because DTP is enabled. Since all provided options are incorrect, no correct conclusion can be selected from the given choices.
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 interface is in access mode.
Why it's wrong here
DTP status is Trunk, not access.
- ✓
The interface will not form a trunk unless the neighbor is set to trunk or desirable.
Why this is correct
DTP mode desirable actively sends DTP frames to form a trunk; it can form a trunk with a neighbor set to trunk, desirable, or auto.
- ✗
The interface is using ISL encapsulation.
Why it's wrong here
Encapsulation is 802.1q.
- ✗
DTP is disabled on this interface.
Why it's wrong here
DTP is Enabled.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.