RODC stands for Read-Only Domain Controller. It is a type of domain controller in the Windows Server operating system that is designed to improve security in branch office and remote locations by providing read-only access to Active Directory Domain Services.

An RODC is designed to reduce the security risks associated with domain controllers in remote locations where physical security cannot be guaranteed. By providing a read-only copy of the domain database, an RODC can help protect against unauthorized modifications to the Active Directory database and other domain information.

To create an RODC, you will need to have a domain controller that is running Windows Server 2008 or later and that is a member of the same domain as the RODC. You can create an RODC by using the Active Directory Domain Services Installation Wizard or by using PowerShell.

The process of creating an RODC involves the following steps:

1. Install the Active Directory Domain Services role on a server that will act as the RODC.
2. Run the Active Directory Domain Services Installation Wizard and select the option to create a read-only domain controller.
3. Specify the domain to which the RODC should be joined, the site to which it should be assigned, and any additional configuration settings.
4. Complete the installation process and allow time for the RODC to replicate the Active Directory database and other domain information.

Once the RODC is created, it can be managed like any other domain controller, but it will have limitations on its ability to modify the Active Directory database and other domain information.