For the DNS part it reuses the bittorrent mainline network, which is very clever.  In retrospect it seems obvious, but no one thought of it until now.  That has 20+ million nodes and 15 year track record.  It is almost impossible to censor. 

 Need to do some research. Insofar all I know is that clients get a .torrent file or magnet link which is used to download / seed some data files.