300-425 Question #236: Real Exam Question with Answer & Explanation

A customer has multiple WGBs located around a warehouse to support mobile and stationary industrial machines. The wireless network consists of these components: - two Cisco 5520 WLCs in a high availability cluster - 100 Cisco 2800 APs in local mode - 25 Cisco IW3700 Series APs in WGB mode - WLANs that are all 802.11a only - UNII 1, UNII 2, and UNII 2E channels in use The customer wants to use only UNII 2 channels within the mobile machine area of the warehouse and must reduce the channel scan time on the WGBs. Which channels must be incorporated in the design for the WGBs?