The Brother DCP-T520W is an all-in-one inkjet printer that supports printing, scanning, and copying. The LAN driver (also called network driver) for this printer enables it to connect to your network via a wired Ethernet connection or Wi-Fi (if using the wireless functionality).

When you install the Brother DCP-T520W LAN driver, you are essentially enabling the printer to communicate with your computer over the local area network (LAN), allowing you to print and scan without needing to connect the printer directly to your PC via USB. This driver is important if you plan to use the printer over a network connection (wired or wireless).