To see all of this in action, let's make all of the requests that the browser does behind the scenes using telnet, which is a command-line tool used to connect to a host, and send messages to it on a port, which is exactly what the browser does. We will do the following in the Terminal:
- Connect to a host called httpbin.org, which is a free HTTP server sending back fake data for testing and learning purpose. To make a HTTP request via telnet, we need to connect on port 80 using the following command. If you do not have the telnet command installed locally on your macOS, install it using the brew package manager:
$ telnet httpbin.org 80
- This should print out the following, saying it is trying to connect to an IP ...
