(ok, identify each network card, but back that time, you could think one MAC address for each computer). This ID is called MAC address, is should uniquely identity each computer. So, instead of giving each computer a name, we gave them an ID.
TO do that, they need to know who was talking and who was being talked to. Without going into OSI model, TCP layer, etc.:īack in time, networks were created: some computers would communicate with each other to share something.