An engineer has deployed a WLAN in a high-density auditorium and expects the number of clients to grow. Which WLC configuration can be used to increase the IP space without any service disruptions?

A dynamic interface maps a single VLAN to a single subnet, so adding one does not expand capacity unless the WLAN is reconfigured to use it, which would cause disruption.

An interface group is a collection of dynamic interfaces that the WLC can use to serve a single WLAN, effectively pooling multiple subnets. When one subnet's address space is exhausted, the WLC automatically assigns addresses from another interface in the group. This allows IP space to scale incrementally without modifying the WLAN configuration or causing client disruptions.

AP groups control which WLANs are broadcast by a set of APs and do not affect IP address space allocation.

An RF group coordinates transmit power and channel assignments among controllers and has no relationship to IP addressing.