Delta transfers? Multiple freshness checking methods? Multiple transport protocols? Built in checksumming? This is not your grandfather's rsync, mind you - the

Delta transfers? Multiple freshness checking methods? Multiple transport protocols? Built in checksumming? This is not your grandfather's rsync, mind you - the protocol is at version 30, IIRC. (As opposed to FTP which has made zero progress in the last two decades) Now, I'm not pretending it's a universal tool (there are far more efficient protocols for e.g. file distribution), but at one way synchronization tasks, it excels.