Vars over internet

I'd like to know if it's possible to use winsock to send vars over the internet in the plain console, if it is, is it much different?

How would a server handle multiple connections at once? Running a thread for each connected client?

Does anyone knows a simple/short way to send vars, or is winsock the way?
that works for ints, could I send structs also?
Back on that topic... So if someone elses needs help, they can find it all in one topic.
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