hey, wussup and welcome to cf. well, for command prompt its like a place where u can tell the computer to do things and it will operate and do the commands as typed. for example, to see what is using my connection right now, i go to command prompt and type "netstat" (without the quotes) and it will give me a list of everything that is accessing my connection and creating noticable usage. more on those commands are here: http://www.computerhope.com/msdos.htm
hope it helps man.