So say someone cut the cables going across the Atlantic. The info would then route through the Mediterranean into the Red Sea, into the Indian Ocean into the Pacific Ocean and get to America that way. To criple that system you would have to cut all teh cables and assume that govts won't be able to fix the cables as fast as you can cut them.
If somehow all the cables in North Atlantic would be cut we're f****.
The route you picture has only 20% of the capacity for the middle east section and would not be able to handle the traffic at all.
The whole world would be back at dial-up times with everything timing out, forget gaming, forget video calls, the delays would be making everyone quit.
Not realistic at all. Remember that the internet was designed by the US military to ensure that communications couldn't be taken out by a single point of failure or even multiple points of failure.
Us military didn't design the global network, it has numerous
weak points in
multiple countries.
Multiple cables and multiple routes can solve the problem but it comes at a price, a very high price!!
Unless we start launching our own rogue satellites which might just be shot out of the sky by then...- not a "space expert" here though; so I hope somebody who dived deeper into the matter can possibly explain how relying on Satellites as backup helps us to make the network sufficiently antifragile when "the shit *really* hits the fan".
Assuming the internet is down, even satellites won't be able to help you.
You would not only have to receive information from those (the way GPS works) but you will have to also send information like your tx and good luck without equipment.
In the case of the blockstream satellites, there are also ground antennas that send the blocks to the satellites and those rebroadcast them back to earth.
If the ground antennas are down or they can't get their blocks from miners then the whole thing is unusable.