When using LDAP for user authentication, what is a significant characteristic?

When using LDAP (Lightweight Directory Access Protocol) for user authentication, a significant characteristic is its ability to offer scalability. LDAP is designed to handle a large number of user entries efficiently, making it well-suited for organizations of varying sizes, including large enterprises.

Scalability in LDAP enables organizations to manage user accounts, directory entries, and authentication processes as their operational needs grow. The structure of LDAP allows for a hierarchical database, which can accommodate thousands of users and various attributes without significant degradation in performance. This scalability is essential for organizations that expect to expand and require a robust authentication system to manage their user access efficiently.

In contrast, the other choices do not accurately reflect the strengths of LDAP. It is not limited to small organizations, does not inherently lack security compared to RADIUS, and is capable of supporting multiple domains through proper configuration. The ability to scale effectively stands out as a primary advantage of using LDAP for user authentication in diverse organizational settings.