표 3. | Table 3. WLAN의 특성 비교 | Technical comparisoon of WLAN.

	Frequency band	Channel bandwidth	Maximum data rate	Key technology
802.11b	2.4 GHz	5 MHz	11 Mbps	DS
802.11a	5 GHz	20 MHz	54 Mbps	OFDM
802.11n	2.4/5 GHz	20/40 MHz	600 Mbps	OFDM, MIMO
802.11ac	5 GHz only	20/40/80/160/80+80 MHz	6.9 Gbps	MU-MIMO
802.11ad	60 GHz	2.16 GHz	6.7 Gbps	Directional antenna
802.11af	TV white space (54~72, 76~88, 174~216, 470~698 MHz)	6/12/24/6+6/ 12+12 MHz	384 Mbps
802.11ah	TV white space (902~928 MHz)	1/2/4/8/16 MHz	346.6 Mbps