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Generic Advertising Services (GAS) Interface to external information sources Example: Carrier of 802.21 data Extensible for types beyond 802.21 “Native” query mode Assists STA with information stored in the 802.11 access network Example: enhances scan for multi-SSID use, so that a secondary SSID can be used for emergency services Operational details (in brief) Multicast/unicast operation Query size limits: administrators can configure response limit size Emergency Services native query: type of authentication |