1.4

Internet infrastructure plays a big role in connection with the Internet because without its transmitters and signals would not have a path thus having no connection at all, its an significant tool when coming to Internet connection, Theres are both hardware and software elements when its comes to Internet infrastructure, the hardware components include transmission media, telephone lines, cable television lines, satellites and antennas, Routers, aggregators, repeaters and other devices that control transmission path 

References
http://searchdatacenter.techtarget.com/definition/infrastructure