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How the Internet Works

Follow a request from your browser through DNS, packets, servers and the cloud.

🟢 Beginner5 lessons

  1. Lesson 1

    What Happens When You Visit a Website

    Follow the lightning-fast journey of data from your browser click all the way to your screen in milliseconds.

    50

  2. Lesson 2

    IP Addresses and DNS

    Discover the global address book that turns human names into numerical internet coordinates.

    60

  3. Lesson 3

    Packets and Protocols

    Learn how data is sliced into tiny packets, routed across networks, and stitched back together reliably.

    80

  4. Lesson 4

    Wi-Fi and Networks

    Understand how radio waves, routers, switches, and MAC addresses connect your local devices to the wide world.

    80

  5. Lesson 5

    Servers and the Cloud

    Step inside modern hyperscale data centres and discover how cloud computing powers the modern web.

    100