How does the internet work, and why do we need wi-fi to use it?
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Wifi is a tool for exchanging information between your mobile device and the router in your building. It uses radio waves basically.
The internet is a tool for exchanging information between your router and other computers that are all connected together. Many of these computers are massive setups owned by companies, and may be called servers. The internet uses copper wires and fibre optic cables to exchange signals, but the key feature is the system of data formats that allow everything to move freely around the network and reach the right destination.
The content that is on all the computers and servers is called the World Wide Web.
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