Computing & AI Class 7
How the Internet Works
How messages find their way, what a web address means, and how search works.
8 lessons · ~39 min total
Track progress — 0 of 8 lessons read 0%
Lessons in this topic
- 0 Start here A roadmap: networks, addresses, asking and answering, search, and how a message travels. · 3 min You are here
- 1 More than one way through A network is computers joined so they can pass messages. There is often more than one path. · 5 min
- 2 What a web address says A web address names which computer to ask, and which page on it to ask for. · 5 min
- 3 Asking and answering Your device sends a request. A server sends an answer. Each piece of a page needs its own. · 6 min
- 4 What a search really looks in A search engine reads an index it built earlier. It does not read the whole internet while you wait. · 6 min
- 5 Cables and radio, on the same trip Radio carries the short first hop from a phone. Cables carry most of the rest. · 5 min
- 6 The big picture Five ideas, tied together into one trip from your tap to the page and back. · 3 min
- 7 Track quiz A cheat-sheet table and a quiz on networks, addresses, requests, search and radio. · 6 min
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