Choose the “backend” protocol CUPS is supposed to
use with your new printer. There are:
local printer (serial, parallel, USB)
remote LPD queue
SMB shared printer (Windows®)
Network Printer (TCP, HP® JetDirect,
AppSocket)
Network printer with IPP (IPP/HTTP)
File printer
serial fax /modem printer
Class of Printers
If some choices are grayed out, they are not available. For
example, maybe you have no fax backend software or no modem installed to
use this.