此工程详细地阐述了用WEB实现拓扑图，代码很详细哦-Detailed descr iption of this project to achieve topology using WEB, the code in great detail oh

3G网络结构拓扑图，其中包含CS域、PS域中各个网元，而且在每个接口上都有协议栈示意图，值得一看-3G network topology, which contains the CS domain, PS domain, the various network elements, and each interface has a protocol stack diagram, worth a visit