300-430 Question 80
Single answerA network administrator is configuring multicast on a WLAN to support a video streaming application. The administrator needs to ensure efficient delivery of multicast traffic to wireless clients while minimizing unnecessary bandwidth consumption. Which configuration step is essential to achieve this goal?
- A
Enable multicast-to-unicast conversion on the WLAN controller.
- B
Disable IGMP snooping on the WLAN controller.
- C
Configure the WLAN to use multicast direct mode.
- D
Increase the DTIM (Delivery Traffic Indication Message) interval on the WLAN.
Show answer and explanation
Correct answer: A
Explanation
Multicast-to-unicast conversion is a critical configuration step for efficient multicast traffic delivery in wireless networks. Since many wireless devices handle unicast traffic more efficiently than multicast, this feature ensures reliable delivery of multicast streams without overwhelming the WLAN with unnecessary traffic. The other options either degrade performance or are less effective for optimizing multicast traffic delivery.
- A. Correct.
Enabling multicast-to-unicast conversion ensures that multicast traffic is converted into unicast packets for wireless clients, improving reliability and reducing bandwidth overhead. This is especially useful when some clients do not support multicast efficiently.
- B. Incorrect.
Disabling IGMP snooping would lead to inefficient multicast traffic delivery and could result in more bandwidth usage as multicast traffic is flooded to all clients in the WLAN.
- C. Incorrect.
Configuring multicast direct mode is not a required step for multicast traffic to function. While it can be used in specific scenarios, it does not minimize bandwidth consumption as efficiently as multicast-to-unicast conversion.
- D. Incorrect.
Increasing the DTIM interval delays the delivery of multicast and broadcast traffic to clients, which could negatively impact real-time applications like video streaming.