Possible to boost internet connection by using ethernet and airport at the same time?

This may not work for everyone. I'm at a college that has both an ethernet based internet connection and a wireless connection; there are different processes to register for these separate connections. One connection is in the wall while the other is a wireless one via one of the several routers set up in the building. I have a new 24" iMac with an airport card.
I want my internet to go a little faster and/or have a bit more bandwidth; is it possible to tap into both the connections at the same time and how would you know which connection you are using at any given time? For all I know I AM using both at the same time right now. Any guidance on this issue would be greatly appreciated.
Also, I'm new to this forum; so I'm sorry if this post is in the wrong place or anything like that.


Thanks!

 

Thank you, you were VERY helpful, unfortunately I just realized that the router connection is down and I've been using just the ethernet connection today. I doubt there's a way to increase the speed using both connections but I really like the site you posted thanks alot!