Skip to content
World 3 · Undersea Cables Around the World · 12 min · PRO

Great circles and cables

Why cables take the routes they do

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.

  • The ocean floor is the Internet's backbone
  • Light in glass
  • Cut!
  • Names instead of numbers
  • A lookup, step by step
PRO includes
  • All 60 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

My notes
Only saved in this browserAll my notes →

Report a mistake

What is wrong?
0 / 2000 · at least 10 characters
Sent along with your report
  • Page
  • About Great circles and cables — How the Internet Works · internet/great-circles-and-cables
Plus your browser type. Reports go to our support system; see the privacy notice.