A web browser on HostA sends an HTTP request to WWW_server. This is the first time HostA has ever sent a request to WWW_server. HostA does not use a hosts file. With which of the following does HostA establish TCP connection in this scenario?
1) Only R1 and WWW_server
2) Only WWW_server
3) Only DNS and WWW_server
4) DNS, R1, and WWW_server