Final answer:
The two forest-specific FSMO roles assigned to the first domain controller in an Active Directory forest are the Schema master and the Domain naming master. These roles are vital for the administration of the Active Directory environment.
Step-by-step explanation:
The two Flexible Single Master Operations (FSMO) roles that are forest-specific and assigned to the first domain controller installed in an Active Directory forest root domain are the Schema master and the Domain naming master.
The Schema master role is responsible for maintaining and replicating the schema across the entire forest. The schema defines the objects and attributes that are stored in the directory. Meanwhile, the Domain naming master role ensures that each domain name is unique within the forest and is involved in adding and removing domains from the forest.
It's important to note that these roles are crucial for the proper functioning and integrity of the Active Directory forest, and they help in the forest-wide administration of the Active Directory environment.