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In 2003, interests in the Institute of Electrical and Electronics Engineers (IEEE) 802.11 Working Group (WG) led to formation of Task Group (TG) "S". 802.11s develops an amendment for Wireless Local Area Network (WLAN) mesh. Unlike existing WLAN mesh products, 802.11s forms a transparent 802 broadcast domain that supports any higher layer protocols. Therefore, 802.11s provides frame forwarding and path selection at layer-2. While traditional WLANs are Access Point (AP) centered, the WLAN mesh is fully distributed. Hence, 802.11s considers extensions to the Medium Access Control (MAC) too. The current 2.0 of 802.11s denotes the optional MAC as Mesh Deterministic Access (MDA). Due to the high amount of indirect neighbors in a WLAN mesh, the current single-hop medium access control mechanisms cannot operate efficiently.
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