In HP LaserJet printers and Color Laserjet printers, there are few direct ports available for printing other than the Network port. They are USB ports and in some older printer, Parallel port is also available.
Some customers want to restrict the usage of these USB and Parallel ports in the printer. They want that feature to be disabled and only want to use the Network port for printing.
It is possible to disable the USB ports and Parallel ports in the printers.