Refer to the exhibit. An engineer determined that during a recent controller failure, some APs did not failover to their secondary controller based on the network design, which has sufficient licenses for all APs. The controllers are not in a mobility group but have A records for their hostnames in DNS. Which setting needs to be addressed?

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?

An engineer added an AP to a deployment after a post-installation site survey. The engineer then notices an increase in co-channel interference and retransmissions. Which two features help mitigate the issue? (Choose two.)

When a wireless survey is conducted at a customer facility, signal attenuation in an area that is surrounded by thick glass walls is noted as 2dB. When Cisco Prime Infrastructure is configured, which obstacle must be placed in a map editor to represent the impact that the glass wall will have on the RF signal in the facility?

An engineer must perform a predictive design for a wireless network for location readiness and to mitigate interference. Which power level does the engineer use?