A TCP connection can send the number of HTTP requests

First, the url is input from the browser to the page to show what the process is going on?

 

Second, modern browsers and servers after establishing a TCP connection, will disconnect after a HTTP request is complete? Will be disconnected under what circumstances?

 

Third, a TCP connection can correspond to several HTTP requests?

 

Fourth, a TCP connection, several HTTP requests can be sent with it?

 

Fifth, why sometimes refresh the page do not need to re-establish an SSL connection?

 

Sixth, the number of browser establishes a TCP connection with a Host has it restricted?