I just examined the headers of HTTP requests and responses regarding to Gmail. First, I submitted username and password and examined the headers. Then deleted an email from inbox and examined again. Many requests and responses were generated during these two main tasks.
My question is, why so many requests and responses are generated for these two main tasks?
And there were a few requests headers (most of them were for images etc.) where cookie is not sent. Then how does server identify me without a session cookie?
I am really thankful if anybody can explain to me what is happening in the headers of this two main tasks.