I'm reading a book about programming, and I want to check an HTTP response message. The book is instructing me
to telnet into your favorite Web server. Then type in a one-line request message for some object that is housed on the server: for example:
telnet cis.poly.edu 80 GET /~hello/ HTTP/1.1 Host: cis.poly.edu
What am I supposed to do, exactly? What program do I need? Where do I need to type this message?