基于http协议的抓包代码，可以抓取到用户在textbox表单中输入的明文密码。-Based on http protocol packet capture code can crawl to the plaintext password entered by the user in the textbox form.

根据已知的网络拓扑图，输入信息，用DV算法更新各路由器的路由表-Network topology based on the known, enter the router s routing table information, updated with the DV algorithm