How would set up a private domain name hierarchy that does not include any of the official InterNCI-assigned domain names?

To set up a private domain name hierarchy without using any official InterNIC-assigned domain names, you can create a custom top-level domain (TLD) that is not publicly registered, such as ".local" or ".private." You would then configure your local DNS server to manage this hierarchy, defining subdomains as needed (e.g., "example.local"). Ensure that any devices or services on your network are configured to use this DNS server to resolve the private domains. Additionally, restrict external access to your DNS server to maintain the privacy of the domain names.