350-401 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
Go deeper
Related to this question
About these practice questions
Courseiva writes every 350-401 question from scratch — 1,175 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.