Cisco WLC v7.0 is configured on 2.4 GHz for mandatory data rates of 9 and 18 Mb/s. Data rates of 6, 12, 24, 36, 48, and 54 Mb/s are configured as supported. All other data rates are disabled. Which…

The 2.4 GHz band supports 802.11b, 802.11g, and 802.11n standards. The configured data rates (6, 9, 12, 18, 24, 36, 48, 54 Mb/s) are all part of the 802.11g/n specification, allowing clients adhering to these standards to connect.

802.11a operates exclusively in the 5 GHz band, but the configuration is specified for the 2.4 GHz band, meaning 802.11a clients cannot connect.

Although 18 Mb/s is a mandatory data rate, the statement 'Clients must be able to receive packets at 9 Mb/s' (option D) covers the lowest mandatory rate, which is a more foundational requirement often highlighted in exam questions, especially when determining broadcast rates.

For a client to associate with an access point, it must support all configured 'mandatory' data rates. Since 9 Mb/s is explicitly configured as a mandatory data rate, clients must be capable of receiving packets at this speed to connect.

Broadcast packets are sent at the lowest mandatory data rate, which is 9 Mb/s, not 18 Mb/s, to ensure all clients can reliably receive them.

Cisco WLCs typically send broadcast frames at the lowest configured mandatory data rate to ensure universal reception, which is 9 Mb/s in this case. Multicast packets, while sometimes defaulting to the lowest mandatory rate, can be configured or optimized in WLC v7.0 to use a higher mandatory rate like 18 Mb/s, especially when multiple mandatory rates are defined.

Broadcast packets are sent at the lowest mandatory rate (9 Mb/s), not 18 Mb/s, to ensure widespread reception by all connected clients.