How computers know which cable to use to send internet signal?

Question

I’m sort of aware of DNS, IP, ARP – all the high level internet stuff.

But if computers look for each other, how do they choose which cable should they send info through? How DNS server chooses “the road” to another computer? Or is it pushing signals everywhere it can and other computers ignore what’s not for them?

In: Technology

Answer 1

It kind of works like the mail.

You send a data packet and write the IP adress of the receiver on it. Your router sends it to the local access point, they send it to the correct region, there the local access points sends it to the correct receiver.