World 2 · Routers and the Path · 12 min · PRO

Hops

Passing the parcel

PRO · How the Internet Works

World 2: Routers and the Path is part of PRO

The first world of How the Internet Works is free. PRO opens the other 26 lessons in 6 worlds — simulations, quizzes and all.

TTL and traceroute
When a link fails
The network of networks
The ocean floor is the Internet's backbone
Light in glass

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All 60 labs — every world, every lesson
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