(Standard for Acceptance and Evaluation of Local Area Network System Based on Ethernet Technology (LAN Acceptance Standard-GB/T21671-2008) National standards, international standards and industry standards, with reference to the methodology of RFC2544 and RFC2889, are formulated for the specific requirements of my country's local area network system acceptance. This standard will be implemented on September 1, 2008. This standard can not only provide technical guidance for the integrated office of network integrators in actual engineering, but also provide technical basis for the network design, acceptance evaluation, and routine maintenance office of the majority of users. It can standardize the LAN construction market and improve the quality of LAN. The purpose of protecting the interests of consumers.)