What requests do browsers' “F5” and “Ctrl + F5” refreshes generate?

Question

Is there a standard for what actions F5 and Ctrl + F5 trigger in web browsers?

I once did experiment in IE6 and Firefox 2.x. The F5

Answer 1

Generally speaking:

F5 may give you the same page even if the content is changed, because it may load the page from cache. But Ctrl-F5 forces a cache refresh, and will guarantee that if the content is changed, you will get the new content.