FTP restart

I have the which many home users have. While downloading anything from the internet the connections snaps and the process needs to be restarted again.

In IBM website I have got piece of info that there is a facility in netscape and IE for FTP restart so that next time when it connects to the internet the download begins from where it ended.

If so how is it done? any idea?
Using 3rd party softwares it can be done but they have their associated hassles which i dont want to have.