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World 2 · Routers and the Path · 13 min · PRO

TTL and traceroute

Mapping the path

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.

  • Hops
  • When a link fails
  • The network of networks
  • The ocean floor is the Internet's backbone
  • Light in glass
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