Which configuration change is recommended to improve the speed of client roaming?

A company is deploying wireless PCs on forklifts within its new 10,000-square-foot (3048-square-rneter) facility. The clients are configured for PEAP-MS-CHAPv2 with WPA TKIP. Users report that applications frequently drop when the clients roam between access points on the floor. A professional site survey was completed.
Which configuration change is recommended to improve the speed of client roaming?
A. EAP-FAST
B. EAP-TLS
C. WPA AES
D. WPA2 AES

Answer: D
Explanation:
Although the controller and APs support WLAN with SSID using WiFi Protected Access (WPA) and WPA2 simultaneously, it is common that some wireless client drivers cannot handle complex SSID settings. Whenever possible, Cisco recommends WPA2 only with Advanced Encryption Standard (AES). However, due to standards and mandatory WiFi Alliance certification process, TKIP support is required across future software versions. Keep the security policies simple for any SSID. Use a separate WLAN/SSID with WPA and Temporal Key Integrity Protocol (TKIP), and a separate one with WPA2 and Advanced Encryption Standard (AES). Since TKIP is being deprecated, Cisco recommends to use TKIP together with WEP, or to migrate out of TKIP completely and use PEAP, if possible.

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