The Brother DCP-L3551CDW is a color laser multifunction printer that supports printing, scanning, and copying. It has LAN (Local Area Network) connectivity, which allows you to connect it to your network for use with multiple devices (like computers or mobile devices) over a wired Ethernet or wireless connection (Wi-Fi).

When you refer to the "LAN Windows driver," you're typically referring to the printer drivers and software that enable the DCP-L3551CDW to communicate over your local network (LAN) with your Windows computer. These drivers are necessary for the printer to be recognized by your system and function correctly for tasks like printing, scanning, and managing print jobs over the network.