What are the uses of having someones ip?
That's like asking what to do with someone's postal address. Nobody can tell you in one post how to be a hacker. Once you have somebody's address (IP), I guess some questions are in order:
What is your GOAL in breaking in? How much access do you NEED to achieve that goal?
Your success will depend on how high your goals are and how well you know their system and it's weaknesses. This is where subtle probing and lots of research will help, determining how secure the box is and what (exploitable) services they may be running. As you become more advanced, your goals will become larger. The amount of research you need to do will never decline, it will just become more specialised. Learn to use Google well.
Regards.
It is far from useless, it is the key to gain access to someone's pc, right? You can port-scan for open ports indeed, but the exploits, you will have to find out yourself ;). There a very many ways to gain access to someones pc, exploiting open ports is just one of them.. link:http://netsecurity.about.com/cs/hackertools/a/aa121303.htm ^^ Check it out ^^ Ciao..