Warez is the general term for illegal software that can be downloaded from the Internet
or that is placed on the Internet as a black copy. A "z" is appended to the name of the corresponding software. Examples: FontZ, AppZ, MP3Z.
If the FTP server of warez providers is discovered on the Internet, then the providers try to transfer their software to other servers as quickly as possible. Since this file transfer must be relatively fast, the providers use the File Exchange Protocol (FXP), which supports data transfer between servers.