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This Concept Map, created with IHMC CmapTools, has information related to: 802.11 Overview, Access Point (AP) is also a Station (STA), The IEEE 802.11 Standard defines 802.11 Services, Extended Rate Physical (ERP) operates in ISM Band 2.4 - 2.4835 GHz, Very High Throughput (VHT) operates in 5 GHz UNII Bands, The IEEE 802.11 Standard defines 802.11 Frames, The IEEE 802.11 Standard defines modulation technologies such as Orthogonal Frequency Division Multiplexing (OFDM), Data Frame may carry a MAC Service Data Unit (MSDU), Clause 19 802.11g is backward compatible with Clause 18 802.11b, Integration characterized as Frame Format Transfer Method, Layer 1: Physical is part of OSI Model, Layer 1: Physical is divided into Physical Medium Dependent (PMD) Sublayer, Frame Body (variable length) can be a MAC Service Data Unit (MSDU), Distribution System Service provides Reassociation, MAC Protocol Data Unit (MPDU) has Frame Check Sequence (FCS) (32-bit CRC), Medium Access Control (MAC) Sublayer interfaces with Logical Link Control (LLC) Sublayer, Station Service also include Authentication, 5 GHz UNII Bands is comprised of UNII-3 5.725 - 5.825 GHz, Station Service used by Access Point (AP), PLCP Protocol Data Unit (PPDU) has PHY Header, Clause 20 802.11n is backward compatible with Clause 18 802.11b