Arduino with ethernet port and relais ouput

Hi,

I need to develop an Arduino application with the following features: A client (for ex. a PC) sends a message to Arduino by lan. Message contains an information about which relais close (latched or pulse). Arduino receives and decrypts message and closes relais output. Which Arduino hardware I have to buy for this application? I need N.3 or 4 relais outputs.

thanks

You need an Arduino with built in Ethernet or an Ethernet shield to fit on a UNO.

Then you need a relay board, there are many different types of you search for them.

The plural of relay is relays not relais.