If you’re interested in how an Ethernet device works, maybe to better understand my tutorials about Arduino’s ethernet shield, Microchip has just published an application note about the Ethernet protocol:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en533903
Microchip is also the manufacturer of enc28j60 chip I described and used in my tutorials…
Via: DangerousPrototypes