Computers come equiped already with a ip computer chip in them with a number of the computer. then when you log on to the internet more numbers are added - your state and city routing numbers. Every computer has their own number but sometimes if you are in a public place where there are many computers reciving the same state and city routing number like the local library has 40 computers all hooked up getting the same internet access. though the computers numbers part of the IP address is different the state and city parts of the IP address is the same so in fast reading of those numbers the internet access notifies the computers system (windows XP for example) that there is a conflict going on. At the library they deal with this conflict with shutting the computers down and rebooting the computers back up again so that when a patron logs into the internet the internet will recognize the computers individual numbers within the IP numbers.