CWNA Wireless Network Administrator

Answer - C - The width of a channel on direct sequence systems for 802.11b equipment is 22 MHz.

Key Takeaway: Channels on 802.11b-compliant DSSS systems in the 2.4 GHz band are 22 MHz wide. 802.11b has a maximum raw data rate of 11 Mb/s and uses the same media access method defined in the original standard. 802.11b devices suffer interference from other products operating in the 2.4 GHz band. These devices include microwave ovens, Bluetooth devices, baby monitors, and cordless telephones.