[ns] vanet simulation

[umair ahmed]

Hi ,I completed my manet simulation in ns2,now I wanna do it for vanet .What is 
the difference between the two?I'm simulating routing protocols in both,I know 
there are many tools for vanet ,like vanetmobsim, and sumo but what exactly 
they do ? I mean why exactly do I need them ,can anybody help me withs sample 
scripts or something.