CCNA Switching and Network Access Practice Question
A network engineer is configuring a new switch port for a VoIP phone that will have a PC daisy-chained behind it. The engineer wants to ensure that voice traffic is tagged with VLAN 100 and data traffic is untagged in VLAN 200. Which configuration should be applied to the switch port?
⚠ Common exam trap
The trap here is assuming that a trunk port is required for voice and data separation, when the voice VLAN feature on an access port achieves the same result with simpler 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
✓
Configure the port as an access port in VLAN 200 and enable voice VLAN 100 with the switchport voice vlan 100 command.
The correct configuration uses the voice VLAN feature on an access port. The port is set to access VLAN 200 for data traffic, and the voice VLAN 100 is enabled. The VoIP phone will tag voice frames with VLAN 100, while the PC's data frames remain untagged and are placed in VLAN 200. This is the standard Cisco approach for connecting a phone and PC on a single switch port.
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 an access port in VLAN 200 and enable voice VLAN 100 with the switchport voice vlan 100 command.
Why this is correct
This configuration sets the port as an access port for data traffic in VLAN 200, while enabling voice VLAN 100 for VoIP traffic. The phone will tag voice traffic with VLAN 100, and the PC's data traffic will be untagged and assigned to VLAN 200. This meets the requirement of tagged voice and untagged data on the same port.
- ✗
Configure the port as a trunk port with native VLAN 200 and allowed VLAN 100.
Why it's wrong here
A trunk port with native VLAN 200 would send untagged data traffic on VLAN 200, but voice traffic would need to be tagged with VLAN 100. However, this configuration does not automatically enable voice VLAN features and may not properly prioritize voice traffic. Additionally, it requires manual trunk configuration and does not use the voice VLAN feature, which is optimized for VoIP deployments.
- ✗
Configure the port as an access port in VLAN 100 and enable voice VLAN 200 with the switchport voice vlan 200 command.
Why it's wrong here
This reverses the VLAN assignments: voice traffic would be in VLAN 200 and data in VLAN 100. The requirement specifies voice VLAN 100 and data VLAN 200. Therefore, this configuration does not match the intended design and would misplace traffic, potentially causing connectivity and security issues.
- ✗
Configure the port as a trunk port with native VLAN 100 and allowed VLAN 200.
Why it's wrong here
This would send untagged voice traffic on VLAN 100 and tagged data on VLAN 200, which is the opposite of what is needed. Voice traffic should be tagged with VLAN 100, and data should be untagged in VLAN 200. This configuration would also not leverage the voice VLAN feature, which provides QoS and other benefits for VoIP.
Visual reference
Go deeper
Related to this question
Learn chapter
Hub vs Switch vs Router: Layer Differences
Key term
Session Initiation Protocol
Session Initiation Protocol (SIP) is a signaling protocol used to start, maintain, and end voice and video calls over IP networks.
Key term
Switch
A switch is a networking device that connects devices on a local area network and uses MAC addresses to forward data only to the intended recipient.
About these practice questions
This 200-301 question is part of Courseiva's 1,450-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
This 200-301 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 200-301 exam.