Challenge 2 / 2

Suppose I put http://localhost:8000 into my browser. Which of the following is true:

The request cannot be completed because there is no filename (e.g. index.php) in the URL

The request uses the DNS to find the IP address of a remote computer, knocks on the door of port 8000, and then executes and returns index.php

The request leaves via port 8000 on my computer, but then routes back to my computer and executes index.php

The request routes back to port 8000 on my local computer and index.php is executed and returned