Description
The Arduino Ethernet Shield V1 connects your Arduino to the internet in mere minutes. Just plug this module onto your Arduino board, connect it to your network with an RJ45 cable (not included) and follow a few simple instructions to start controlling your world through the internet. As always with Arduino, every element of the platform – hardware, software and documentation – is freely available and open-source. This means you can learn exactly how it's made and use its design as the starting point for your own circuits. Hundreds of thousands of Arduino boards are already fueling people’s creativity all over the world, everyday
 
Features:
Brand new and high quality.
With this Ethernet Shield, your Arduino board can be used to connect to internet.
Can be used as server or client.
Directly plug puzzle board, no soldering required.
Controller: w5100.
This is the latest version of the Ethernet Shield.
This Ethernet Shield which is based on the Wiznet W5100 Ethernet Chip gives you an easy way to get your Arduino Online.
It is directly supported by Arduino official Ethernet Library.
It adds a micro-SD card slot, which can be used to store files for serving over the network.
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.
The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP.
It supports up to four simultaneous socket connections.
Use the Ethernet library to write sketches which connect to the internet using the shield.
Fits all version of arduino Main board,2009,UNO, mega 1280, mega 2560.
 
Resources:
1. Arduino Ethernet Shield Tutorial
2. Getting Started with the Arduino Ethernet Shield
3. Introduction to Arduino Ethernet Shield