A customer requires that an SSID is broadcasted to specific access points that use certain interfaces. Which feature can be used to achieve this goal?

Mobility groups define trust relationships between WLCs for inter-controller roaming and have no function related to controlling which APs broadcast an SSID or which interfaces are assigned to it.

FlexConnect groups are used to manage configuration and policies for FlexConnect-mode APs in branch deployments and do not provide interface-to-SSID assignment functionality.

Interface groups allow an administrator to group multiple VLAN interfaces into a single logical entity and assign that group directly to a WLAN, giving precise control over which interfaces handle traffic for a given SSID. When combined with WLAN-to-AP mappings, interface groups fulfill the requirement to broadcast an SSID using specific interfaces on selected access points. This is distinct from AP groups, which focus primarily on AP-level WLAN overrides rather than interface-level grouping.

AP groups allow per-group WLAN and interface overrides for sets of APs but are not the mechanism specifically designed to group and assign interfaces to WLANs as a primary function.