Commonly Used for Federated Identity Management

A.

The correct answer is A. SAML.

SAML (Security Assertion Markup Language) is commonly used for federated identity management across multiple organizations. It is an XML-based standard used to exchange authentication and authorization data between different organizations. SAML allows users to log in once and access multiple applications and services without the need to enter credentials each time.

Active Directory (B) is a directory service developed by Microsoft for Windows domain networks. It provides authentication and authorization services as well as other directory-related functionalities.

Kerberos (C) is a network authentication protocol used to provide secure communication over a non-secure network. It uses a trusted third-party authentication server to authenticate clients and servers.

LDAP (D) is a protocol used to access and manage directory information. It provides a hierarchical structure for organizing and accessing information about users, computers, and other resources on a network.

While all of these technologies are related to identity management in some way, SAML is specifically designed for federated identity management, making it the correct answer for this question.