Ok ip is easy the internet protocal address is associated with numbers like 255.255.255.255 you can do alot with an ip address everythng that connects to net has one even a website. We can browse files with a pc's ip just like a website like this http://255.255.255.255 ok every ip address uses ports. Port's are the many different connections to the net. If you want to check files from an unsecure ip address use the common port#21 . Port 21 is used for person ftp. Each port has a different connection purpose. Htt://255.255.255.255:21 will be the url to browse an unsecure connection. want more ?