300-120 WLSI: Implementing Cisco Wireless Advanced Solutions

By Cisco · Question Mode

QuestionQ52

QoS on a Wireless Network

A network engineer has created a new wireless network for guest access. The corporate network must use all rates. The guest network must use only lower rates rather than 802.11n data rates.

To accomplish this task, what must the WLAN's WMM policy be set to?

Explanation

Set WMM to disabled. WMM is required for 802.11n (and later high-throughput) data rates, so disabling it prevents the guest WLAN from using those rates and leaves it operating with legacy lower rates. Allowed is not sufficient because it permits WMM-capable clients to use 802.11n rates; it only withholds those rates from clients that do not support WMM.

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