Ethernet+RF433

Hello people, I have some questions :)

I will buy a ethernet shield, but I read how it's works.

I would like know how I can send the command via Web from arduino with ethernet and rf 433 transceiver to rf 433 receiver.

Simplifying I enter the page web and click "Turn On Led" the arduino Master send a msg to arduino slave and the led turn on.

Thx

Someone help in this problem?