1.where is packet diagram:

The “Packet Diagram” pane in Wireshark displays the current packet (selected in the “Packet List” pane) as a diagram, similar to ones used in textbooks and IETF RFCs 1. To view the packet diagram, you can open the “Edit -> Preferences -> Appearance -> Layout” dialog and select the packet diagram option for one of the panes. It’s usual to select it in pane 3 instead of the packet bytes display as the packet list (pane 1) and packet details (pane 2) are essential to the use of Wireshark 2. The packet diagram pane shows the protocols and top-level protocol fields of the packet selected in the “Packet List” pane as a series of diagrams 13. There is a context menu (right mouse click) available 1. For more information, please refer to Figure 6.7, “Pop-up menu of the ‘Packet Diagram’ pane” 1.

task：

1. Is your browser running HTTP version 1.0 or 1.1? What version of HTTP is the server running?



it’s HTTP/1.1, note that the collapsed bar below is not the valid info but the analyzed info from the origin: GET /wireshark-labs/HTTP-wireshark-file1.html HTTP/1.1\r\n ,this origin info tells the Request Method 、 URI and Version。

2. What languages (if any) does your browser indicate that it can accept to the server?

3. What is the IP address of your computer? Of the gaia.cs.umass.edu server?



note that the destination address is 128.119.245.12 which is exactly the ip of gaia.cs.umass.edu server. But the Source Address of my host indicating 113.54.226.75 which confused me that it shouldn’t be my IP in the Local network.
But as I change the net to Ethernet ,the IP turns into my local net.

4. What is the status code returned from the server to your browser?
304 Not Modified, this indicates that the content I request is cached in my browser and haven’t changed since last modified.

5. When was the HTML file that you are retrieving last modified at the server?



since the return code is 304 which means the it didn’t change since If-Modified-Since: Tue, 14 Nov 2023 06:59:02 GMT

6. How many bytes of content are being returned to your browser?
in this case where the return code is 304 ,which means didn’t return the content, the byte is :



293 bytes



without the cache, the response content is 128 bytes(note this is just the http part of response)

7. By inspecting the raw data in the packet content window, do you see any headers within the data that are not displayed in the packet-listing window? If so, name one.
no. All the info is shown corresponding to the raw data.