200-301 Question 177
Single answerA network administrator is configuring a switch port to connect an IP phone and a workstation. The IP phone will be connected directly to the switch, and the workstation will connect through the IP phone. The administrator needs to ensure that voice traffic is prioritized over data traffic while maintaining proper VLAN segmentation. What configuration should the administrator apply to the switch port?
- A
Configure the port as an access port and assign it to the voice VLAN.
- B
Configure the port as a trunk port and allow both the voice and data VLANs.
- C
Configure the port as an access port, assign it to the data VLAN, and configure a voice VLAN.
- D
Configure the port as a trunk port and prioritize voice traffic using QoS.
Show answer and explanation
Correct answer: C
Explanation
To connect an IP phone and a workstation using the same switch port, the port should be configured as an access port assigned to the data VLAN. Additionally, a voice VLAN should be configured to separate and prioritize voice traffic from the IP phone. This ensures proper traffic segmentation and prioritization without requiring a trunk port configuration, which is more complex and unnecessary for this scenario.
- A. Incorrect.
Incorrect: Configuring the port as an access port and assigning it to the voice VLAN would not allow the data VLAN traffic to pass, which is required for the workstation connected through the IP phone.
- B. Incorrect.
Incorrect: Configuring the port as a trunk port would allow multiple VLANs, but trunk ports are not typically used for connecting end devices such as IP phones and workstations. This may also complicate the configuration unnecessarily.
- C. Correct.
Correct: Configuring the port as an access port, assigning it to the data VLAN, and configuring a voice VLAN ensures that the port operates in access mode for data traffic while allowing voice traffic on the specified voice VLAN. This configuration is optimal for IP phones and workstations connected through the phone.
- D. Incorrect.
Incorrect: While a trunk port can carry multiple VLANs and QoS can prioritize voice traffic, this configuration is not ideal for connecting end devices like IP phones and workstations. Access ports with a voice VLAN are the recommended approach.