Literally, hacking is accessing something or somebody in internet without their permission or interest. While, speaking in summary, hacking is very easy job, it is like instead of using front door, finding the hidden door of a house and hijacking the precious things. Among all the hacking, hacking via IP address is one of the most common yet powerful beginning.
You may want to hack the website and put your advertisement there or grab some database information In this type of hacking, you are playing with the web server’s computer instead of the administrator’s computer. Because, www.website.com is hosted in separate web server rather than personal computer.
Another can be accessing your friend’s computer from your home. Again this is IP based and this is possible only when your friend’s computer is online. If it is off or not connected to internet then remote IP hacking is totally impossible.