Have you ever counted up everything in your home that connects to the internet? There your phone and laptop, but also the TV and game console, plus maybe a video doorbell and many other smart home devices. It pretty likely that theyre all sharing one public internet address, and it your router job to figure out which incoming data belongs to which device. This is because IPv4, the internet original address system, ran out of fresh addresses back in 2011. It was replaced by IPv6, which has...
