What should be ensured regarding the Domain Controllers (DCs) with FSMO roles for fault tolerance?

Ensuring that Domain Controllers (DCs) with FSMO (Flexible Single Master Operations) roles are not burdened with additional network services is crucial for maintaining their performance and reliability. FSMO roles are essential for the proper functioning of an Active Directory environment, as they manage specific tasks like schema modifications and operations master roles. If a DC that holds an FSMO role is overloaded with extra network services, it may become a performance bottleneck or experience issues during peak loads, potentially leading to service outages or delays in directory operations.

Maintaining dedicated resources for these DCs helps to ensure they can respond promptly and effectively to requests, reducing the risk of failures and enhancing the overall stability of the Active Directory infrastructure. Other considerations, such as the physical location of DCs, the configuration of security protocols, and power supply backups, are also important for fault tolerance but do not directly address the immediate impact of resource allocation on the operational efficiency of FSMO roles.