Exam 300-430 topic 1 question 198 discussion

A. From 7.2 release onwards, in order to have dynamic VLAN assignment, AP would have the interfaces for the VLAN pre-created based on a configuration using existing WLAN-VLAN Mapping for individual FlexConnect AP or using ACL-VLAN mapping on a FlexConnect group. https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-8/FlexConnect_DG.html#pgfId-43429:~:text=In%20order%20to%20have%20dynamic%20VLAN%20assignment%2C%20AP%20would%20have%20the%20interfaces%20for%20the%20VLAN%20pre%2Dcreated%20based%20on%20a%20configuration%20using%20existing%20WLAN%2DVLAN%20Mapping

according to AI, B is the answer

AP group: The AP group configuration on the WLC determines the VLAN mappings for WLANs. By configuring the AP group to allow dynamic VLAN assignment, Cisco ISE can assign users to specific subnets (VLANs) based on their credentials. Why not the other options? A. WLAN VLAN: This is used for static VLAN assignment and does not support dynamic assignment by ISE. B. VLAN ACL: This is used for access control and does not affect VLAN assignment. C. RF group: This is used for radio frequency management and is unrelated to VLAN assignment. Thus, the correct mapping to modify is the AP group to enable dynamic VLAN assignment by Cisco ISE.

WLAN VLAN mapping is the answer. D. is incorrect there is no dynamic vlan configuration done there. You need to add the VLANs that you will dynamically assign to the WLAN VLAN mapping.