So you can connect any hub or switch to a broadband internet connection and then all the PC's connected to the hub will have internet conection without one of them running a proxy server? I mean, in this case, you can turn on any computer in the network indistinctly and have internet with the others PC's turned off? I know this would be unsafe, but I tough that this could only be done with a Router. I mean assuming that the modem of the internet conection is a single modem, not a modem-router.

Greetings, and I apologize if you find hard to understand something, I know my english isn't the best one when making long sentences is necessary :P