The Brother MFC-7470D is a multi-function laser printer that supports printing, scanning, and faxing. When you're using it over a network or setting it up for remote use (e.g., printing from multiple computers over a network), you might need a specific driver or port configuration to ensure the device can communicate with the computer or network properly. The Remote Setup Port you're referring to is likely associated with the network setup, where the printer is being accessed via a network or remotely via a TCP/IP port.