A read-only domain controller (RODC) is a type of domain controller that can read files and network resources but cannot alter the domain or Active Directory. RODCs provide services like replication and backup without the ability to make changes. They are installed by promoting a computer to an RODC, which then houses read-only operations for Active Directory Domain Services. RODCs are useful in situations that require additional security as they cannot modify production domain controllers or Active Directory domains that contain a writable domain controller.

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What Is A Read-only Domain Controller?
A read-only domain controller the name given to a computer used solely to read files and network resources of
Windows Server. Domain controllers that are read-only can be used to track or manage server data however, they
are not able to alter the system.
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1. What is a domain controller that is read-only?
An read-only-only-domain controller (RODC) is a form of domain controller employed in a domain that is set up as
an read-only domain.
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2. Why should you use a read-only domain controller?
A read-only domain controller an instance of a server that’s utilized to offer services to domains, but is not legally
authorized to make any modifications on the domain. All modifications are performed by an administrator of the
domain. A domain controller that is read-only is typically used to offer services like replication services as well as
backup and DNS services.
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3. How do you install a domain controller that is read-only?
An read-only Domain Controller (RODC) is one kind made of Microsoft Windows Server 2008 or later computers
that are used to provide authentication for the domain which is only accessible to the user. If a computer belongs to a
part of a domain, it may also be considered a “domain controller”, or an employee of a group. Domain controllers
are the machine that hosts Active Directory Domain Services (AD DS) and the RODC is the machine which houses
all AD DS read-only operations.
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4. Conclusion.
Read-only Domain Controller (RODC) is unique kind of domain controller. It is intended to function as an unread-
only replica of a production domain controller. This type of controller can be employed in situations that require
security. RODCs are not able to alter the production domain controller , or on or to the Active Directory. RODCs are
also not able to change an Active Directory in a domain which already has an writable domain controller.
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