WLC SSO is set up between two WLCs in a service provider network serving public spaces. On WLC failover, it is noticed that only about half of the original client count is now showing on the secondary WLC, although it is currently showing the role as active.
Which design side case explains the issue?

A wireless engineer is performing a post verification of a wireless network.
Which two metrics does the engineer verify to ensure that the wireless network can support voice services? (Choose two.)

The wireless learn must configure a new voice SSID for optimized roaming across multiple WLCs with Cisco 8821 phones. Which two WLC settings accomplish this goal? (Choose two)

What causes the most signal attenuation, based on the wireless design tools?

A new wireless network design has these requirements:
- AireOS WLCs as guest anchors
- a Cisco Catalyst 9800 Series WLC as the foreign controller
- use of Wi-Fi 6 APs
- inter-controller roaming for guest users
Which two design approaches meet these requirements? (Choose two.)