300-425 Question 62
Single answerA network administrator is configuring multicast on a Cisco Wireless LAN Controller (WLC) to optimize video streaming performance across the wireless network. The administrator wants to ensure that multicast packets are efficiently delivered to clients while minimizing unnecessary wireless traffic. What should the administrator configure on the WLC?
- A
Multicast-Multicast mode with IGMP Snooping enabled
- B
Multicast-Unicast mode to convert multicast traffic to unicast
- C
Enable IGMP Proxy on the WLC and disable multicast forwarding
- D
Multicast-Multicast mode with IGMP Snooping disabled
Show answer and explanation
Correct answer: A
Explanation
To optimize multicast performance in a wireless network, configuring Multicast-Multicast mode on the WLC with IGMP Snooping enabled ensures efficient delivery of multicast packets to clients that have subscribed to the multicast group. IGMP Snooping helps the WLC determine which clients need to receive the multicast traffic, reducing unnecessary traffic and improving overall network performance.
- A. Correct.
This is the correct option. Multicast-Multicast mode with IGMP Snooping ensures that multicast traffic is forwarded efficiently to only the clients that have joined the multicast group, reducing unnecessary traffic on the wireless network.
- B. Incorrect.
This is incorrect. Multicast-Unicast mode converts multicast packets to unicast, which increases overhead on the wireless network and is not optimal for video streaming performance.
- C. Incorrect.
This is incorrect. While IGMP Proxy can be used in certain scenarios, disabling multicast forwarding would prevent multicast traffic from being delivered to the clients, defeating the purpose.
- D. Incorrect.
This is incorrect. Disabling IGMP Snooping would result in multicast traffic being forwarded to all clients, even those that are not part of the multicast group, leading to unnecessary wireless traffic.