Does rsync support resuming feature?

[Daniel]

Hi All,
Does rsync support resuming feature?
Now, this is the case, when we back a 4GB file, for example.
I have backed up for about 2GB in progress, and we found this is a connnection problem to Internet, so we simply re-plug the net-cable and do rsynce again.

Currently, I found rsync have to re-transfer the 4GB file again.

Is there any way out of the problem or simply an option will do?  Thanks.
 				
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Sincerely yours,

Daniel Li
2009-01-19