What creates a trust relationship between networks and their directory services?

The correct choice focuses on the concept of directory services and how they establish trust relationships between networks. Directory services are systems that store, organize, and provide access to information in a directory, which can include user accounts, computers, groups, and various other resources within a network.

When two different networks communicate or need to share resources, they can create a trust relationship through their directory services. This allows for secure authentication and authorization processes between the two networks, ensuring that users within one network can access resources in the other network without needing separate credentials. Such relationships are crucial in environments where different organizations or departments need to work together while maintaining security.

The other options are related to network operations but do not directly pertain to establishing a trust relationship through directory services. Control Plane refers to the layer in networking responsible for routing and signaling, while peering often describes the interconnection between two networks to exchange traffic. Active Directory Services, while a specific implementation of directory services used in Windows environments, do not encompass the broader category that includes all directory services capable of creating trust relationships. Thus, the term “directory services” is the most accurate choice in capturing this concept comprehensively.