Based on the provided Lexmark reference, port 9400 is a TCP port used for print data.
Lexmark network port drivers utilize specific network ports for communication and data transfer with devices. According to the information provided from the Lexmark support website regarding ports used by the Lexmark network port driver (specifically mentioning the CX920 model):
Key Ports Used by Lexmark Network Drivers
| Port Number | Type | Function |
|---|---|---|
| 161 | UDP | SNMP port |
| 9300 | UDP | For alerts |
| 9400 | TCP | For print data |
| 9500 | TCP | For the Server NPAP connection |
As detailed in the table, TCP port 9400's primary function, in the context of this Lexmark driver, is dedicated to handling the transmission of print data. This means when a computer sends a print job to a Lexmark printer using this specific network driver, the data transfer for the print job itself occurs over this port.
Understanding which ports are used by network devices like printers is crucial for network configuration and troubleshooting, particularly when dealing with firewalls or network access control lists. Opening or allowing traffic on TCP port 9400 would be necessary to enable print functionality for devices using this driver.
