It's all about Internet Protocol addresses, which are unique numbers, one of which your computer uses when connected to the internet so that every other computer on the internet can talk to you. Your IP address is a bit like your phone number

FreeNAS is a free NAS (Network-Attached Storage) server, supporting: CIFS (samba), FTP, NFS, RSYNC protocols, local user authentication, Software RAID (0,1,5) with a Full WEB configuration interface.