http://science.opposingviews.com/function-network-interface-card-1422.html
http://www.webopedia.com/TERM/W/wireless_network_interface_controller.html
http://www.wisegeek.com/what-are-the-different-ways-to-connect-to-the-internet.htm
http://www.internetbasics.gov.au/connecting_to_the_internet/types_of_internet_connections
http://www.gcflearnfree.org/computerbasics/13.2
http://www.tech2u.com.au/training/tech2u/internet/connect.html
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