CCNP Infrastructure Practice Question
An engineer needs to configure a switchport to carry traffic for multiple VLANs to a router using a single physical link. Which configuration should be applied on the switchport?
⚠ Common exam trap
It's easy for candidates to confuse Dynamic Desirable (a DTP negotiation mode) with a trunk port configuration, thinking negotiation automatically results in trunking, but the question asks for the configuration that directly enables multi-VLAN traffic, not a negotiation protocol.
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
✓
Configure the port as a trunk port.
A trunk port is specifically designed to carry traffic for multiple VLANs over a single physical link using IEEE 802.1Q encapsulation. This allows the switch to tag frames with VLAN IDs, enabling the router (often configured as a router-on-a-stick) to route between VLANs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure the port as a dynamic desirable port.
Why it's wrong here
Dynamic desirable is a DTP mode, not a trunk.
- ✓
Configure the port as a trunk port.
Why this is correct
Trunk ports carry multiple VLANs.
- ✗
Configure the port as a routed port.
Why it's wrong here
Routed ports are Layer 3 interfaces.
- ✗
Configure the port as an access port.
Why it's wrong here
Access ports carry only one VLAN.
Visual reference
About these practice questions
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JA
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.