How does the control panel connect to the formatter on the HP LaserJet Enterprise M4555 MFP?

A.
The control panel connects directly to the formatter using a serial connection.

B.
The control panel uses internal IPv6 addressing to connect with other components.

C.
Because the control panel contains its own processor, it does not need to connect to the
formatter.

D.
The control panel uses a USB cable to connect to the ICB, which is connected to the formatter.