抓取生成树协议数据包，分析桥协议数据单元 在实验设备上查看VLAN生成树，并学会查看其它相关重要信息-Spanning tree protocol packet capture, analyze the bridge protocol data unit in the experimental device, view the VLAN spanning tree, and learn to see other important information related to

利用DxHtmlParser单元 *网页代码捕捉 *链接抓取 例子是百度的-Use DxHtmlParser unit * Page code capture * Link to crawl Example is Baidu s

帧是网络中基本传输单元，熟悉帧结构对于理解网络协议的概念、协议执行过程以及网络层次结构具有重要的意义 -A network frame is the basic transmission unit, familiar with the frame structure for understanding the concept of network protocols, and network protocol implementation has important significance

截获数据包的单元，您可以调用相应的-caputer the packet