The University of SydneyPage 3What’s the Internet: “nuts and bolts”view–billions of connected computing devices: –hosts =end systems–running network apps§communication links•fiber, copper, radio, satellite•transmission rate: bandwidth§packet switches:forward packets (chunks of data)•routersand switcheswiredlinkswirelesslinks
routersmartphonePCserverwirelesslaptop
mobile networkglobal ISPregional ISPhome network
institutionalnetwork