The Alcatel X220 Application 3 Port Windows driver likely refers to the software required to enable a connection between the Alcatel X220 device and a Windows-based computer. The Alcatel X220 is a mobile or USB device, such as a mobile hotspot, USB modem, or some other peripheral that requires specific drivers to function correctly with a PC.

The "Application 3 Port" part suggests that the device has a connection interface involving three communication ports, which could be for different functionalities such as data transfer, management, or control. Without more specific information about the exact device model, it's likely that the driver ensures that Windows properly detects and communicates with the device for data exchange or internet connection purposes.