
First you have to know what is Wi-Fi and how dose it work? "Wi-Fi" is a type of wireless networking protocol that allows devices to communicate without cords or cables.1: Wi-fi uses antennas around which wi-fi "hotspots" are created. The hotspots are outlets equipped to receive the radio waves that power wireless networking. Until recently, wi-fi has been confined to more than 10,000 hot-spots in cafes, bars and airport lounges. But various projects are under way to set up city-wide zones, where a series of antennas are installed in the streets, on lampposts or street signs. The hotspots around them together create a much wider area...