text: If you put 2 IP Addresses on a network it will get confused and not know which one to send the data too. So no you can't have two of the same IP addresses. \n\nI think you might be woundering how the router sorts the data it recives from the Internet and knows which computer to send the data to in the network with one IP Address. This is done by NAT and you can find it explained here http://computer.howstuffworks.com/nat.htm