What is a I.P address. I know it indedtifies you on the internet, but does it do it from your computer or your network. I had issues with pay pal and have been told they trace your I.P address. I have since changed address, computer and internet provider (at new address) and have started using my girlfriends paypal. However I am settin up a wireless network and was going to set my old computer up. Will this show up my old IP address or will the old IP address remain with my old internet provider?