I have a wireless router that provides broadband internet access via my cable provider to a computer and a tivo. I don't want wireless signals in my house because of their potential link to cancer and am looking to replace my set-up with something wired. If I could plug both ethernet cables (one from the computer and one from the tivo) in my cable modem, I would. That got me thinking that maybe they sell an adapter that will turn one ethernet port into two or four. The man at radio shack said there is, but it will hurt my connection speed. He recommended a wired router. He told me a switch would hurt my connection speed too. After a little research, I learned there are also devices called hubs. My question is which would be better, a wired router or hub, is either one better than the other regarding connection speed, and will either one sent harmful wireless signals?