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This shield allows an Arduino board to connect to the internet. This module is based on is based on the WIZnet W5100 Ethernet chip.
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Ethernet library refernce 
Korduino Ethernet Shield
The Arduino Ethernet Shield allows you to connect the Arduino board to the Internet. It supports four simultaneous socket connections based on Wiznet W5100 Ethernet chip. Use the Ethernet library when connecting to the Internet using a shield . You can use the long wire-wrap header to connect to the Arduino board and stack it with other shields.
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