一些常用的ns3网址，官方网址，和维基网址，可以帮助使用者查看一些官网文档，也可下载官方最新版本。
Some common ns3 site, the official site, and wiki site can help users to view some of the official website of the documents, the latest official version can also be downloaded. (2015-09-10, TEXT, 1KB, 下载1次)