Domain Access can do its magic because of the Drupal node access system. In this tutorial we'll walk through the basics of how this system works, highlighting the two main methods, and then explain why this may be important information for you. We won't be diving into the code side of things, but instead outline the basic concepts for anyone who needs to interact with this system. When using a module like Domain Access, you should be aware of the Drupal context in which you are working, even if you hopefully never have to dive into the details.
Check your version
This video covers a topic in Drupal 7 which may or may not be the version you're using. We're keeping this tutorial online as a courtesy to users of Drupal 7, but we consider it archived.