On my Ubuntu, I can run the following commands, and get HTTP response
telnet www.ietf.org 80 GET /rfc.html HTTP/1.1 Host: www.ietf.org
I heard that Telnet protocol is insecure, so is it correct that the remote host doesn't run Telnet server?
What does my telnet client connect to, if no telnet server running on the remote host?
Does telnet client connect to any open port on any host, without the host running telnet server?