With the Arduino Ethernet Shield, this library allows an Arduino board to connect to the internet. It can serve as either a server accepting incoming connections or a client making outgoing ones. The library supports up to four concurrent connection (incoming or outgoing or a combination).
The Ethernet class initializes the ethernet library and network settings.
The Server class creates servers which can send data to and receive data from connected clients (programs running on other computers or devices).
The client class creates clients that can connect to servers and send and receive data.
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