The one host still serving e-mails—Another host—now has two templates assigned. But what if we separated out in individual templates all services, applications, and other data that can be logically grouped? That would result in a bunch of templates that we would need to link to a single host. This is not tragic, but what if we had two servers like that? Or three? Or 20? At some point, even a configuration with templates can become hard to manage—each host can easily have a template count of a dozen in large and complicated environments.
This is where the simplicity is coupled with powerful functionality. Behind the scenes, templates aren't that different from hosts. Actually, they are hosts, just somewhat special ones. This means that a template can be linked to another template, thus creating a nested configuration.
How does that apply to our situation? Let's create a simple configuration that would allow the easy addition of more hosts of the same setup. In Configuration...