What capability does WLC Layer 3 roaming provide for wireless clients?

WLC Layer 3 roaming (also known as inter-controller roaming) allows a wireless client to maintain its original IP address even when it roams to an access point (AP) that is associated with a different Wireless LAN Controller (WLC) or a different client VLAN on the same WLC. This is crucial for applications that require a persistent IP address, preventing connection drops and re-establishment. The original WLC (anchor controller) tunnels the client's traffic to the new WLC (foreign controller), ensuring seamless connectivity. Incorrect options: "maintain their connection between APs even when the AP management VLANs are different" refers to AP management, not client roaming. "maintain their connection even if the client IP address changes when roaming" is incorrect because Layer 3 roaming's primary goal is to prevent the IP address from changing. "roam seamlessly between controllers even when the controller management VLANs are different" focuses on controller management, not the client's IP address persistence.