说明：  使用Wireshark分析FTP协议 HTTP和FTP都可以用来通过网络传输对象和文件，但它们的工作方式截然不同。HTTP侧重于传送立即浏览的文件或供暂时高速缓存于客户端的文件。HTTP还侧重于表达那些包含了用于规定文件格式的首部信息，以便让浏览器能正确解释内容。而 FTP却更侧重于专门进行数据传输，让用户自己去决定文件在本机上的存储时间和如何处理数据
(Use Wireshark to analyze HTTP and FTP FTP protocol can be used over the network objects and documents, but they work in very different ways. HTTP transmitted immediately focused on the file or browse for the temporary cache on the client' s file. HTTP also focused on the expression used to specify the file that contains the header information format, so that the browser can correctly interpret the content. The FTP was more focused on specialized data transmission, allowing users to decide for themselves on the local file storage time and how to handle data)