Contents › Chapter 5 The Way Back
The whole world is linked by countless lines
View in 3DWhen you look at the whole Earth, the undersea cable is not just one line. The whole world is linked by countless lines, woven together like a net. So even if one line breaks, the route-finding machines find another way around. The detour is a little longer, so it takes a little more time.
Why?If there were only one road, everything would stop when it was blocked. Streets in a town branch in many directions, so you can go around one that is closed. The internet was built from the start to connect in many ways.
Learn moreThe name "internet" means "connecting nets to other nets." There are about 600 undersea cables. Laid end to end, they would stretch more than 1.4 million km — enough to wrap around the Earth more than 35 times.
Simplified route · light in glass at about 200,000 km per second
View this scene in 3D →Wikipedia: Submarine communications cable · Wikipedia: Internet
More in the series
Times are simplified values, calculated from a simplified route (Busan → south of Japan → Pacific → Oregon, about 9,200 km) and the speed of light in glass (about 200,000 km per second). Real times vary with the carrier, the route and traffic.