Port 9100; Wsd Print - Konica Minolta A0DX011 Reference Manual

Port 9100

When printing through a network, TCP/IP port number 9100 can be used to
send raw data.

WSD print

Printing is possible using the WSD (Web Service on Devices) function
installed in Windows Vista. A connection supports WSD, detects the printer
on the network automatically and connects. Specifying a WSD printer when
printing from Windows Vista/7/Server 2008/Server 2008 R2 allows printing
using Web service for communication.
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Network Printing