Which type of tunnel Is required between two WLCs to enable Intercontroller roaming?

Refer to the exhibit. Which result does the python code achieve?

A company has an existing Cisco 5520 HA cluster using SSO. An engineer deploys a new single Cisco Catalyst 9800 WLC to test new features. The engineer successfully configures a mobility tunnel between the 5520 cluster and 9800 WLC. Client connected to the corporate WLAN roam seamlessly between access points on the 5520 and 9800 WLC. After a failure on the primary 5520 WLC, all WLAN services remain functional; however, Client roam between the 5520 and 9800 controllers without dropping their connection. Which feature must be configured to remedy the issue?

How does NETCONF YANG represent data structures?

When firewall capabilities are considered, which feature is found only in Cisco next-generation firewalls?