said by tmc8080:Those are not different versions of 11n. Just a different number of bonded channels. Which is supported by the 11n standard. Though bonding channels on the 2.4 spectrum causes a lot of problems for your neighbors.
besides, there are so many versions of 802.11n; 150, 300, 450 and now 802.11ac is about to become the same... that the wireless network equipment will be a hodgepodge of frequencies & speeds that it will look like the analog modem days from 300 baud to 56000 baud..