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802.11b HR DSSS
a) High-rate DSSS using a 2.4 GHz band
b) Similar to DSSS excluding for encoding method
c) Uses complementary code keying (CCK), encoding 4 or 8 bits to one CCK symbol
d) Defines four data rates: 1, 2, 5.5 and 11 Mbps
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802.11g OFDM a) Uses OFDM with same 2.4 GHz band b) Achieves a 54-Mbps data rate c) Works with same 802.11b equipment
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