What type of trust is created automatically between parent and child domains in Active Directory?

A transitive trust is an automatic relationship established between parent and child domains in Active Directory. This type of trust allows security principals in one domain to access resources in another domain without requiring separate trust relationships for each domain. When a parent domain and a child domain are created, they automatically inherit a transitive trust, meaning that if domain A trusts domain B, and domain B trusts domain C, then domain A also trusts domain C. This simplifies management and enhances resource sharing across multiple domains, making it a crucial feature for organizations that utilize a hierarchical domain structure in Active Directory.