Newbie question: '3xx result' means?

[irobert]

Hello everyone,

Is there a glossary about what the '3xx result' row identifier in the 'waterfall view' exactly means?

I can see:

* rows highlighted with yellow are at least duplicated in this view.
* the time for those rows is appended with (301)

Is it saying the .css, .gif, and .jpg are being called more than once, or?

Thanks for your help.