USB 3.0. While the Nintendo Switch only supports USB 2.0 Ethernet LAN Adapters, the USB 3.0 Adapters are best for you. ... Even if your internet and/or online network from Nintendo aren't fast enough to take advantage of the 1000 Mbps speed from USB 3.0 LAN adapters, it's still a good idea to get one over the 2.0 adapters.