How is Multicast Transmission Optimization implemented in an HPE Aruba wireless network?

How is Multicast Transmission Optimization implemented in an HPE Aruba wireless network?

A. "The optimal rate for sending multicast frames is based on the highest broadcast rate across all associated clients

B. When this option is enabled the minimum default rate for multicast traffic is set to 12 Mbps for 5 GHz

C. The optimal rate for sending multicast frames is based on the lowest broadcast rate across all associated clients.

D. The optimal rate for sending multicast frames is based on the lowest unicast rate across all associated clients.

View Answer

Answer: B

Explanation:

A. The optimal rate for sending multicast frames is based on the highest broadcast rate across all associated clients – This isn’t correct. Basing multicast rate on the highest broadcast rate across all associated clients would mean that only clients with a good signal would benefit. Clients with lower signal quality might struggle or fail to receive these multicast packets.

B. When this option is enabled the minimum default rate for multicast traffic is set to 12 Mbps for 5 GHz – This sounds closer to the approach Aruba might use for Multicast Transmission Optimization, especially on a 5 GHz band. However, we should evaluate all options.

C. The optimal rate for sending multicast frames is based on the lowest broadcast rate across all associated clients – This is not correct. Using the lowest broadcast rate would mean that multicast traffic would be transmitted at the slowest possible rate, which is exactly what we’re trying to optimize away from.

D. The optimal rate for sending multicast frames is based on the lowest unicast rate across all associated clients – This isn’t the best approach. Using the lowest unicast rate would mean accommodating even the client with the poorest link quality, which can slow down multicast traffic for all other clients.

The best way to optimize multicast in a wireless environment is to increase the rate at which multicast packets are sent so that airtime is used more efficiently. By setting a higher minimum rate (like the 12 Mbps for 5 GHz mentioned in option B), the network ensures that the multicast traffic is sent more quickly and efficiently, but this might mean that only clients with a good enough signal can decode these packets.

Given the options and the understanding of how Aruba networks handle multicast traffic, the most likely answer is:

B. When this option is enabled the minimum default rate for multicast traffic is set to 12 Mbps for 5 GHz.