Huawei supports two main forwarding modes in its wireless architecture:

Tunnel Forwarding (A, C): All data traffic is encapsulated in CAPWAP and sent to the WAC. This simplifies security policy enforcement but causes 'traffic detour' and places a heavy processing load on the WAC.

Direct Forwarding (B, D): APs switch traffic locally. This is highly efficient and reduces core congestion. However, because traffic is released at the edge, maintaining session continuity (roaming) across different Layer 3 boundaries can be more complex, potentially leading to slight performance dips during inter-edge handovers compared to centralized tunneling.