What is a distributed database method used to authorize users accessing resources on multiple servers?

The correct method for authorizing users accessing resources on multiple servers is LDAP (Lightweight Directory Access Protocol). LDAP serves as a directory service protocol used for accessing and maintaining distributed directory information services over an Internet Protocol (IP) network. It provides a framework to manage user accounts and their associated information across multiple servers, enabling centralized authentication and authorization.

When users need to access resources across different servers, LDAP facilitates the process by allowing them to authenticate with a centralized directory. This centralized management simplifies the administration of user permissions and access controls, ensuring that user credentials and attributes are consistently available across the entire network and easily managed from one point.

In contrast, other options perform different functions. Active Directory, while it provides directory services that may include LDAP as a protocol, is specifically a service for managing user data, security, and distributed resources within a network. RADIUS (Remote Authentication Dial-In User Service) is more focused on remote access authentication, typically for services like VPNs or network access, while Kerberos is a network authentication protocol designed to provide strong authentication for client-server applications. All these services may work in conjunction with LDAP, but LDAP is the primary protocol for accessing directory services and managing user authorizations across multiple servers.