DNS redirecting explanation

The following are part of the configuration instructions from a white-label site: Point the [login to view URL] DNS "A" Record to {the WL IP address} Point the [login to view URL] DNS "A" Record to {the WL IP address} Point the [login to view URL] DNS "A" Record to {the WL IP address} Point the [login to view URL] DNS "A" Record to {the WL IP address} Point the [login to view URL] DNS "A" Record to {the WL IP address} I need to know how implementing these changes work to enable the WL site to send their content through my site. I will also need a simple demo of how to mimic the process that takes place when a site is configured in this way. I have my own server, so I will be able to set-up your demo on my server.