What is the difference between 802.11a/b/g/n wireless specifications ?

Here is the major difference in the form of simple chart :

  802.11a 802.11b 802.11g 802.11n
Operating Frequency 5.15Ghz - 5.35Ghz 2.4Ghz 2.4Ghz 2.4Ghz or 5Ghz
Bandwidth Upto 54Mbps(actual 22Mbps) Upto 11 Mbps Upto 54 Mbps Upto 700Mbps
Range 50 feet 100 feet 100 feet 50 Feet
Cost More expensive Less expensive Less expensive More expensive
Interference Less prone More prone More prone prone

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