Implementing Cisco Enterprise Wireless Networks (ENWLSI) — Question 282

What is the Cisco recommended configuration for a Cisco switch port connected to an AP in local mode for optimal voice over WLAN performance with an 8821 wireless phone?

Answer options

• A. switchport encapsulation dot1q switchport mode trunk mls qos trust device cisco-phone
• B. switchport mode access mls qos trust device cisco-phone
• C. switchport mode access mls qos trust cos
• D. switchport mode access mls qos trust dscp

Correct answer: D

Explanation

The correct answer, D, specifies that the switch port should trust DSCP for QoS, which is essential for prioritizing voice traffic. Option A is incorrect because it configures the port as a trunk, which is not optimal for an access point connection. Option B is incorrect as it does not specify the trust setting for QoS, and option C trusts CoS instead of DSCP, which is less effective for voice traffic management.