This Amaze Me About Internet
All the wireless technology you enjoy today at home, is powered by a ton load of wires.
Undersea real physical cables does all the connections from point to point.
That is the map of undersea cables which carries all your requests across the globe. These set of cables span across the world. They are typically owned by major telecom providers.
The cables are very very thin, but are protected by layers and layers of protection:
The SEA-ME-WE_3 is the longest of those cables:
It is 39,000 kms long and goes from Europe, middle east, India to Australia.
Lets say I want to watch youtube.com. It will actually go to one of the google datacenters spread across the world.
So, lets say I make the request from India where there is no google datacenters then my request will somehow go from my laptop through a bunch of routers, proxies, forewalls over a series of undersea cables and then find it’s way to a google server and give the response back within roughly 200 milli seconds. And this will happen concurrently with probably tens of millions of similar request which originated from India at the same time.
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