@pete, let's be fair now. I don't think the OP was asking us to do their homework, just looking for a place to start. There's a difference.
If, after having wireshark installed, the OP had typed, I installed it, what do you do with it. plz guide me stepbystep, URGENT!!!, I'd be be inclined to agree.
However, my impression is quite different--as you can see, once given a starting point, the OP is working it out on their own.
To Shardharmit, forgive me for discussing you as if you weren't there.
It's just that, unfortunately, we do get many posts like, I have to XYZ for assignment, someone plz guide me step by step, thx, with a thread title of URGENT!!!!!
So, many of us who have been around awhile, tend to get cranky when we see homework/assignment or something similar. However, as mentioned in this post, my impression is that you have asked a question that is reasonable, without expecting anyone to do your assignment for you.
(You'll find, if you stick around the forums a lot, that Pete is actually one of the nicest, and most helpful people here, though no doubt he'll be annoyed with me for revealing that.)