The easiest way to tell if there is client-side caching is to use various browser developer tools and see what is being cached client-side.  Chrome and IE have developer tools built-in, and Firefox has the crazy good Firebug.

Here's a quick primer:  http://www.daniweb.com/web-development/javascript-dhtml-ajax/reviews/351831/ie9s-f12-developer-tools-vs-firebug

As for server-side, caching is configured in several different places and ways.  See this page for an overview:  http://msdn.microsoft.com/en-us/library/ms178597.aspx