Why can I not see TCP protocol when uploading file to a site in Wireshark Program?

[notfound]

I am trying to siniff the pakets by uploading a text file to http://gaia.cs.umass.edu/wireshark-l...rk-file1.html. But when I start and upload that file.I can only see NBNS protocol(and 3 packets are sent).Why cannot see the tcp protocol?I have already chosen the interfaces at the beginning and I am using wireless Internet.I also have made some Google search but couldn't find any useful thing.Thanks for any reply.

[sicarie]

To sniff packets, you have to install Wireshark and perform a capture on your interface. Uploading a text file to a website is simply that - uploading a text file to a website. That is not a capture, nor will it help you capture.

The Wireshark documentation is located here, and will help you get an idea of what you're looking at as well as what you're trying to capture.

Another possible option, if you have installed Wireshark and started a capture, is that you have not initiated a TCP connection. Try opening a web browser while doing a capture and navigating to a website - that should give you TCP pcaps.