AC's country code → "Used for communication between the AC and AP and CAPWAP tunnel establishment." VAP → "Used to virtualize a physical AP into VAPs." AC's source address → "Used to specify the radio features of APs, including the transmit power and supported channels." AP group → "Used for general configurations of multiple APs." Forwarding mode → "Used to control the traffic direction of data packets."

https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/HUAWEI_H12-311_V3.0/page_85_img_2.jpg  Layer 2 Networking → "The AC and APs are located in the same broadcast domain, so the APs can directly discover the AC through broadcast frames."  Layer 3 Networking → "The AC and APs are located in different network segments, so the intermediate network must have available routes between the AC and APs."  Off-path Networking → "The AC is connected to the live network in off-path mode to manage WLAN services of APs."  In-path Networking → "The AC directly connects to APs or access switches and also serves as an aggregation switch."