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World 3 · Undersea Cables Around the World · 11 min · PRO

The ocean floor is the Internet's backbone

Why "the cloud" lies under the sea

PRO · How the Internet Works

World 3: Undersea Cables Around the World 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.

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  • Great circles and cables
  • Names instead of numbers
  • A lookup, step by step
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