Network Load Balancer?

I think the load balancer takes incoming traffic requests and forwards those requests to 1 of multiple internal servers (www3.yahoo.com, for example) and then that server sends you responses directly. In this sense all requests to one URL are load balanced among several independent servers. Essentially it is just URL redirection based on traffic usage. You can send information to a load balancer's IP but the load balancer never sends traffic outside of the LAN. So, that would probably be spoofing.