计算机网络实验HTTP.doc

1. The Basic HTTP GET/response interaction1. Is your browser running HTTP version 1.0 or 1.1? What version of HTTP is theserver running?答：是的，是1.1版。2. What languages (if any) does your browser indicate that it can accept to theserver?答: Accept-Language:zh-CN，说明用户想得到该对象的中文版本。3. What is the IP address of your computer? Of the server?答：我电脑的IP地址是6, 服务器的地址是2。4. What is the status code returned from the server to your browser?答：状态码为：HTTP/1.1 200 0K 。5. When was the HTML file that you are retrieving last modified at the server?答：Last-Modified:Tue,13 Sep 2011 12:31:01 GMT。6. How many bytes of content are being returned to your browser?答：Content-Length:128。7. By inspecting the raw data in the packet content window, do you see any headerswithin the data that are not displayed in the packet-listing window? If so, nameone.答：在原始资料里，并不是所有的标题都可以被发现。2. The HTTP CONDITIONAL GET/response interaction8. Inspect the contents of the first HTTP GET request from your browser to theserver. Do you see an “IF-MODIFIED-SINCE” line in the HTTP GET?答：如截图所示，没看见有这一行。9. Inspect the contents of the server response. Did the server explicitly return thecontents of the file? How can you tell?答：是的，我们可以在Line-based text data栏看见返回的text文件内容。10. Now inspect the contents of the second HTTP GET request from your browser tothe server. Do you see an “IF-MODIFIED-SINCE:” line in the HTTP GET? Ifso, what information follows the “IF-MODIFIED-SINCE:” header?答：是的，If-Modified-Since:Tue, 13 Sep 2011 13:25:01 GMT。11. What is the HTTP status code and phrase returned from the server in response tothis second HTTP GET? Did the server explicitly return the contents of the file?Explain.答：返回的状态码和相应状态信息是: 304 not modified；服务器没有明确的返回所请求对象的内容，因为是缓存器通过使用该对象，而向浏览器转发的该对象的拷贝。3. Retrieving Long Documents12. How many HTTP GET request messages were sent by your browser?答：有4个HTTP GET请求信息。13. How many data-containing TCP segments were needed to carry the single HTTPresponse?答：需要4个data-containing TCP segments ，分别是1460，1460，1460，423字节，总共4803字节。14. What is the status code and phrase associated with the response to the HTTP GETrequest?答：状态码和相应状态信息是：200 OK。15. Are there any HTTP status lines in the transmitted data associated with a TCP-induced“Continuation”?答;没有。4. HTML Documents with Embedded Objects16. How many HTTP GET request messages were sent by your browser? To whichInternet addresses were these GET requests sent?答：有4个HTTP GET请求，Internet addresses分别是：2，4，0，2 17. Can you tell whether your browser downloaded the two images serially, orwhether they were downloaded from the two web sites in parallel? Explain.答：串行，因为在两个请求的响应消息中，端口号是不同的。5 HTTP Authentication18. What is the servers response (status code and phrase) in response to the initialHTTP GET message from your browser?答：状态码和相应状态信息是：401 Authorization Required。19. When your browsers sends the HTTP