I am taking the Dreamweaver CS4 ACE exam on Monday and am having trouble understanding what one of the objectives on the test is really asking. The objective is, Given a scenario, describe the infrastructure required to support application servers. (Scenarios include ColdFusion, ASP,JSP. What I am missing, I think, is what do they mean by infrastructure. The only thing I can think of or find doing research is that different software and hardware on the hosting site would be required but I can't find out what that is or if I am correct. If you can give me some insight that would be greatly appreciated.