CCNA: Cisco Certified Network Associate — Question 1275
An engineer is configuring data and voice services to pass through the same port. The designated switch interface fastethernet0/1 must transmit packets using the same priority for data when they are received from the access port of the IP phone. Which configuration must be used?
Answer options
- A. interface fastethernet0/1 switchport voice vlan dot1p
- B. interface fastethernet0/1 switchport priority extend cos 7
- C. interface fastethernet0/1 switchport voice vlan untagged
- D. interface fastethernet0/1 switchport priority extend trust
Correct answer: D
Explanation
The correct answer, D, allows the switch to trust the priority of incoming frames from the access port, ensuring that data and voice packets are treated equally. Option A is incorrect as it specifies a voice VLAN configuration without addressing data packet priority. Option B sets a specific COS value but does not trust the incoming priority. Option C incorrectly suggests an untagged voice VLAN, which may not properly handle the prioritization required.