The Ethernet shield is very easy to install. It fits perfectly on the Arduino Uno and on the Arduino Mega. You do him just simply clicking on it.
The Arduino software includes an Ethernet class, which allows you to quickly create your connection to your network.
So you can easily connect to a website or even a Web server.
This Ethernet shield has a slot for a micro SD card so you can store data of the Ethernet.
There can be a PoE (Power over Ethernet) Module on the shield is soldered to the supply from the network.
(Our Arduino boards are Chinese copies, and include the appropriate bootloader)
There is no difference in operation between a real and a copy!