802.11n builds upon previous 802.11 standards by adding MIMO (multiple-input multiple-output). MIMO uses multiple transmitter and receiver antennas to allow for increased data throughput via spatial multiplexing and increased range. It is roughly 4 times that of 802.11a and g and offers 100 megabit per second (Mbps) throughput. Future 802.11n systems that incorporate additional spatial streams will deliver up to 600 Mbps with channel bonding.
The n standard offers increased coverage area (twice the range), higher throughput and better Quality of Service. In addition, 802.11n will support all major platforms, including consumer electronics, personal computing, and handheld platforms. Picture quality required by HD video can be achieved with 802.11n wireless networks.
802.11g standards use the 2.4 GHz (gigahertz) band. They will suffer interference from microwave ovens, Bluetooth devices, cordless telephones, baby and security monitors and other appliances using this band. The new standard is also backwards compatible with older a and g standards.