实施“校校通”工程以来,各地区和学校纷纷进行“校园网”的建设。校园网络的发展之快、普及之广、应用范围之大,对推动我国计算机教育教学的发展起到一个促进作用。但随着校园网络的广泛普及,校园网络的性能和效用问题也逐渐显现得越来越突出。本文拟以中学校园网的建设为例,? Since the implementation of the “school through” project, all regions and schools have conducted “campus network” construction. The rapid development of campus network, wide spread, the scope of application, to promote the development of computer education in China played a catalytic role. However, with the widespread popularization of campus network, the performance and utility of campus network have gradually become more and more prominent. This paper plans to build secondary school campus network, for example,?