To ensure network security, WLAN devices comply with the three-layer and three-plane security isolation mechanism...

To ensure network security, WLAN devices comply with the three-layer and three-plane security isolation mechanism of X.805. Data flows at different importance levels face different security threats with varying impacts on users. To avoid mutual impacts between data flows, three security planes are planned on WLAN devices. Which of the following does not belong to Huawei ' s network security architecture model?