Versions of IEEE 802.11b
Direct Sequence Spread Spectrum (DSSS)
- Uses the entire frequency band to transmit information
- Capable of data rates of up to 11 Mbps
- Fallback rates: 5.5, 2 and 1 Mbps. (Used when interference or congestion occurs)
- Dominates market place, because faster
Frequency Hopping Spread Spectrum (FHSS)
- Divides the frequency band into a series of channels
- Then changes its frequency channel about every half a second, based on a pseudorandom sequence
- More secure,
- Only capable of data rates of 1 or 2 Mbps