300-425 Question 53
Select 3A network administrator is tasked with configuring QoS for a wireless network to ensure that voice traffic is prioritized over other types of traffic. The wireless network uses a Cisco WLC (Wireless LAN Controller). Which of the following actions should the administrator take to implement QoS for wireless clients effectively?
- A
Configure the WLAN to use Platinum QoS for voice traffic.
- B
Enable WMM (Wi-Fi Multimedia) on the access points and the WLAN.
- C
Assign DSCP (Differentiated Services Code Point) values directly to wireless clients.
- D
Map QoS profiles to specific SSIDs as per traffic requirements.
- E
Disable WMM to avoid interference with QoS settings.
Show answer and explanation
Correct answers: A, B, D
Explanation
To implement QoS for wireless clients, the administrator must configure the WLAN to prioritize voice traffic using the Platinum QoS profile, enable WMM for wireless QoS functionality, and map QoS profiles to SSIDs to align traffic prioritization with application requirements. Disabling WMM or assigning DSCP values directly to clients would not achieve the desired QoS goals.
- A. Correct.
Configuring the WLAN to use Platinum QoS ensures that voice traffic receives the highest priority. Platinum corresponds to voice traffic in Cisco QoS profiles.
- B. Correct.
Enabling WMM is essential for supporting QoS on wireless networks. WMM prioritizes traffic at the wireless MAC layer, ensuring better performance for voice and video applications.
- C. Incorrect.
DSCP values are assigned at the wired network layer and are typically mapped to QoS profiles on the wireless side. Assigning DSCP values directly to wireless clients is not a standard practice in QoS configuration.
- D. Correct.
Mapping QoS profiles to SSIDs ensures that traffic on specific SSIDs is handled according to its QoS requirements, allowing for better traffic segregation and prioritization.
- E. Incorrect.
Disabling WMM would disable QoS functionality for wireless clients, negating any prioritization benefits.