Exam 300-430 topic 1 question 156 discussion

Agree with wirelessvibes. Based on https://www.cisco.com/c/en/us/support/docs/wireless-mobility/voice-over-wireless-lan-vowlan/116056-technote-qos-00.html WMM also shortens the Interframe Spacing requirements for high priority packets so that voice and video can be sent in bursts without the need to wait as much for lower priority data inbetween. Additionally, WMM is needed in order to obtain 802.11n and 802.11ac data rates. This means that with --== WMM disabled ==-- or for non-WMM clients, the maximum usable data rate is 54 Mbps. WMM Enable WMM on a WLAN in order to create the simplest implementation of QoS; this option is on the QoS tab in the WLAN configuration menu. Other WMM policy settings are: Disabled - WMM is not in use on the WLAN. Required - Clients must support WMM or they are not permitted to access the WLAN. Allowed - Clients that support WMM may use it, while those that do not support WMM can still connect to the network.

What you can do is go to your WLAN SSID and under the QoS feature, disable WMM. WMM is required for 802.11N support... Test is out and hopefully that solves your issue.

The following are WMM policies available on the WLAN: - Disabled: Disables WMM on the WLAN. - Required: Requires client devices to use WMM. Devices that do not support WMM cannot join the WLAN. - Allowed: Devices that cannot support WMM can join the WLAN but will not benefit from the 802.11n rates. From the above, it seems only WMM capable devices would be able to use 802.11n data rates. Therefore, if WMM is disabled, no device will be able to use 802.11n rates at all. Correct answer is C.

WMM also shortens the Interframe Spacing requirements for high priority packets so that voice and video can be sent in bursts without the need to wait as much for lower priority data inbetween. Additionally, WMM is needed in order to obtain 802.11n and 802.11ac data rates. This means that with WMM disabled or for non-WMM clients, the maximum usable data rate is 54 Mbps. WMM Enable WMM on a WLAN in order to create the simplest implementation of QoS; this option is on the QoS tab in the WLAN configuration menu. Other WMM policy settings are: Disabled - WMM is not in use on the WLAN. Required - Clients must support WMM or they are not permitted to access the WLAN. Allowed - Clients that support WMM may use it, while those that do not support WMM can still connect to the network.

C as it is about disabling the rates for guest access. Source by wirelessvibes is correct

Mandatory, so the correct answer are D