Basic Rate of 802.11b and 802.11g

802.11b and 802.11g basic rate

Operational Mode	Supported Transmit Rates (Mbps)	Supported Basic Rates (Mbps)*	Slot Time	Protection Mechanism (CTS-to-Self)
11b only	1, 2, 5.5, 11	1 (default), 2	20 us	Not Supported
11g only	6, 9, 12, 18, 24, 36, 48, 54	6, 12,2 4(default)	9 us	Not Supported
11g - wifi	1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54	1, 2, 5.5, 11, 6, 12, 24(default)	9 us	Not Supported
11bg	1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54	1, 2 (default), 5.5, 11	9 or 20 us (dynamic)	Implemented

*The Basic Rate Set contains the rates that all devices in the cell must support; it is a sub-set of the Transmit Rate Set.  All control, multicast, and broadcast packets are  transmitted using one of the Basic Rates (as defined by the IEEE 802.11 standards).