1.With this Ethernet Shield, your Arduino board can be used to connect to internet.
2.Can be used as server or client.
3.Directlyplug puzzle board, no soldering required.
4.Controller: w5100.
5.This is the latest version of the Ethernet Shield.
6.This Arduino Ethernet Shield which is based on the Wiznet W5100 Ethernet Chip .
7.It is directly supported by Arduino official Ethernet Library.
8.It adds a micro-SD card slot, which can be used to store files for serving over the network.
9.It is compatible with the Arduino Duemilanove (168 or 328), Uno as well as Mega (1280/2560) and can be
accessed using the SD library.
10.The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP.