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The internet is a global network of networks — a vast WAN connecting billions of devices worldwide. This lesson covers the structure of the internet, how data finds its way across it, and the critical role of the Domain Name System (DNS).
The internet is a worldwide collection of interconnected networks. It is not a single network owned by one organisation — it is a network of networks, linked together by routers, fibre optic cables, satellite links and other infrastructure.
Important distinction: The internet is the physical network infrastructure (cables, routers, servers). The World Wide Web (WWW) is a service that runs on top of the internet — it is a collection of web pages accessed through browsers using HTTP/HTTPS.
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