Since the original posts in this thread, my go-to kit is the old Lightning-to-Camera adapter and a Belkin USB 2 ethernet adapter. The nice thing about that is that it doesn't need external power to work (
https://www.amazon.com/Belkin-USB-2...04689&sr=8-1&keywords=belkin+usb+2.0+ethernet). It looks like Amazon doesn't have it right now, but it's also at Target and Best Buy for <$20.
For the sake of testing, I _think_ USB 3 may work if you have the newest Lightning-to-Camera adapter and an iPad Pro 12.9" - I've used an Anker USB 3 one (
https://www.amazon.com/Anker-Unibod...89304666&sr=8-5&keywords=anker+usb+3+ethernet) with an iPad Air 2, but it obviously was limited to USB 2 speeds. Connecting it to my iPad Pro reports as 10/100/1000 ethernet, but I'll have to check with a direct connection to my router in the morning.
I'm also really glad Apple has fleshed out Settings>Ethernet in iOS 10.2. Doing network admin things with my phone and two small dongles is really really nice.
🙂