The Ethernet is getting more and more popular in China; by now, almost all Local Area Network in China adopts the Ethernet technology. Ethernet also has a wide application on nearly 90% of the enterprises all over the world; it has already become a major networking method for enterprise users. The main reasons for the enterprises to use Ethernet as their networking solution are its rich of network resources and a long term acumination of application experiences. Currently, most of the popular operating systems and applications are compatible to the Ethernet network; this means, if a modern embedded system application is designed without Ethernet connecting capability, it could be treated as a disadvantage on its functionalities or a downgrade to its values.