Those are not USB ethernet adapters.
That is a set of adapters that are designed to allow you to extend a USB connection using CAT5/6 cables. They will not work through an existing set of routers or hubs, and they will not give you a wired ethernet connection via a USB port.
I have a lot of experience with those types of extenders. I had a horrible time trying to get one (I tried at least three different models from three different companies) to work to extend my CM15A's usb coneection. I got horrible interference on it, which would drop the connection for an instant. That would cause the CM15A to lock up. YB can ask Kevin and Erik about that. I spent a lot of time working through the issues with them over the course of a few months, and we finally concluded the problem was the extenders. They are simply not designed for devices that need a constant high-reliability connection.
In any case, they are not what you think they are, and they cannot be used to connect your AirPad to your wired network.