Free Wireless Networks: Where We Are, Where We’re Headed Tutorial

“>1.1 IntroductionTechnological innovations of engineers during the 20th century have brought adeep change in our lifestyle. Today, when we fly over a modern city at night wesee the earth full of footprints made by engineers. The glowing lights remind usof the impact made by electrical engineers; the planes we fly in and the movingcars below remind us of the contributions of mechanical engineers; and high-risebuildings and complex roads remind us of what civil engineers have accomplis 
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