802.11a operates on 5 GHz with a throughput of 23 Mbit/s and a Data rate max of 54 Mbit/s using OFDM standard range indoors ~35 Meters standard range outdoors including one wall ~120 Meters (~393 feet).

802.11b operates on 2.4 GHz with a throughput of 4.3 Mbit/s and a Data rate max of 11 Mbit/s using DSSS standard range indoors ~38 Meters standard range outdoors including one wall ~140 Meters (~460 feet).

802.11g operates on 2.4 GHz with a throughput of 19 Mbit/s and a Data rate max of 54 Mbit/s using OFDM standard range indoors ~38 Meters standard range outdoors including one wall ~140 Meters (~460 feet).

802.11n operates on 2.4/5 GHz with a throughput of 74 Mbit/s and a Data rate max of 248 Mbit/s (my linksys reports 330) using MIMO standard range indoors ~70 Meters standard range outdoors including one wall ~250 Meters (~820 feet).