Dell shipped this laptop with up to 7 different network devices including both LAN and WLAN. When asking for a driver, you need to utilize the Comment Box we provide with the request form and provide specific info about the device you need a driver for including the country it's used in as well as the chipset it contains.
With the vague info provided, all I can suggest is to visit the
Dell website and click on the word "Network (7)" to see the available downloads for networking devices, then choose the one that matches the actual hardware.