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WAN is a wide area network, as such it is spread over a very large area such as a city, country or even a continent and overseas, the internet is a WA http://www.freetechexams.com/computer-networking/network/what-is-wide-area-network.html
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First of all there are routers which are hardware equipment used for connecting many wired/wireless networks to each other. It is a layer 3 gateway; h http://www.freetechexams.com/computer-networking/network/hardware-used-for-setting-up-home...
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