An engineer has been tasked with optimizing roaming for all the wireless networks used by shops located in a shopping center. A unique WLAN is assigned to each individual shop named…

Access rules based on location are a policy enforcement mechanism, not a roaming optimization technique, and do not affect how clients transition between APs.

Disabling the 802.11a/b network affects band steering and capacity but does not address the per-shop VLAN segmentation needed to optimize roaming.

Enabling AES encryption improves data security but has no effect on the roaming performance or handoff behavior between APs.

Creating an interface per shop on the 9800 WLC assigns each shop's unique WLAN to a dedicated VLAN and subnet, ensuring clients roaming between APs within the same shop remain on the same Layer 2 domain without triggering IP renewal. This scoped segmentation also allows roaming policies and QoS settings to be applied per shop, directly optimizing the roaming experience for each distinct network.