Overview of WLAN TopologiesIBSSBSSESS802.11 Medium Access MechanismsOverview of CSMA/CACarrier SenseDCFThe Acknowledgment FrameThe Hidden Node Problem and RTS/CTS802.11 Frame FragmentationPCFThe Contention Free PeriodPC OperationPCF Operation ExampleNonstandard DevicesRepeater APsUniversal Clients and Workgroup BridgesWireless Bridges802.11 MAC Layer OperationsStation ConnectivityThe Probe ProcessThe Authentication ProcessThe Association ProcessPower Save OperationUnicast Power Save OperationBroadcast802.11 MAC Frame Formats802.11 Control FramesThe PS-Poll FrameThe RTS FrameThe CTS FrameThe ACK FrameThe CF-End and CF-End+CF-ACK Frames802.11 Management Frame Fields and ElementsThe SSID IEThe Supported Rates IEFH Parameter Set IEThe DS Parameter Set IEThe CF Parameter Set IEThe TIM IEThe IBSS Parameter Set IEThe Challenge Text IE802.11 Fixed Field ElementsThe Authentication Algorithm Number FieldThe Authentication Transaction Sequence Number FieldThe Beacon Interval FieldThe Capability Information FieldThe Current AP Address FieldThe Listen Interval FieldThe Reason Code FieldThe AID FieldThe Status Code FieldThe Timestamp Field802.11 Management FramesThe Beacon FrameThe Probe Request FrameThe Probe Response FrameThe Authentication FrameThe Deauthentication FrameThe Association Request FrameThe Association Response FrameThe Reassociation Request FrameThe Reassociation Response FrameThe Disassociation FrameThe ATIM802.11 Data FramesThe Data FrameThe Data+CF-Ack, Data+CF-Poll, and Data+CF-Ack+CF-Poll FramesThe Null DataThe CF-Ack, CF-Poll, and CF-Ack+CF-Poll FramesSummary