I had seen many changes in the specification of a router. I had noticed as 802.11g or 802.11n. What is the different between this two different configuration. I am not able to determine the actual speed different between two router. If go for anyone of them blindly does the really matters. I just do not want to go for a wrong device that can cause issue in future. I need a mid range router that can be used for router and other purpose also.