How to create a server for data transfer?

Question

Python

This is probably a very stupid question for this site, but when you try to google, it always gives out the creation of servers for games and more.
I read about the socket library and drove data between computers a little, but as I understand it, it works to transfer data between processes and computers working on the same network.
My goal is to transfer data from one computer to another, running on different networks.
Could you drop the reading or "rudely" say how to create such a server?

Answer 1

There is no difference between data transmission in one network and in different ones.

Answer 2

My goal is to transfer data from one computer to another, running on different networks.

First - adjust their visibility relative to each other.
Read here .