Looking for answers from nginx experts, under what circumstances does the nginx server disconnect from the client? What is the process of disconnection, including the process at the tcp level?

Question

Under what circumstances does the nginx server disconnect from the client? What is the process of disconnection, including the process at the TCP level?

过去多啦不再A梦 · Answer

http 1.0 defaults to the server closing the connection

Schematic diagram of tcp layer