The WLAN stack is split into several layers: - Policy implements interfaces that are used by applications running on Fuchsia. - Device Monitor manages WLAN devices and interfaces. - Core consists of several components and libraries: - SME (Station Management Entity) implements the 802.11 SME interfaces. - MLME (MAC Sublayer Management Entity) implements the 802.11 MLME functions. - Drivers contains driver implementations for various hardware.