Which term describes the relationship that allows trust to extend between domains in Microsoft Active Directory?

The term that describes the relationship allowing trust to extend between domains in Microsoft Active Directory is transitive trust. In this context, transitive trust means that if Domain A trusts Domain B, and Domain B trusts Domain C, then Domain A also trusts Domain C. This creates a chain of trust that simplifies resource sharing and user authentication across multiple domains.

Transitive trusts are fundamental in large and complex Active Directory environments where multiple domains are necessary, allowing for centralized management and security without having to establish direct trust relationships between each pair of domains. This streamlined approach is particularly beneficial for organizations that operate in multiple domains within the same forest, as it minimizes administrative overhead and enhances trust relationships.

The other options provided offer different concepts that do not directly relate to the trust model in Active Directory. Cross-Certification refers to establishing trust between different certification authorities, a concept relevant in Public Key Infrastructure (PKI). A Trusted Third Party (Bridge) refers to an intermediary that facilitates the establishment of trust between entities that may not otherwise trust each other, typically used in broader scenarios beyond just Active Directory. Open Authorization (OAuth) pertains to token-based access control in web services, and is not related to domain trust relationships.