What does Single Sign-On (SSO) achieve in user account management?

• A. It requires a separate username for each application.
• B. It enhances data encryption for all apps automatically.
• C. It eliminates the need for auditing.
• D. It allows using one identity to access multiple apps.

Answer: (D)

SSO lets a user authenticate once with a trusted identity provider and then access multiple applications without re-entering credentials for each one. This is exactly what using one identity to access several apps means: after the initial sign-in, you gain seamless access across the connected services. It improves user experience by reducing repeated logins and helps with security policy enforcement and centralized access control, since the identity provider can apply MFA, role checks, and revocation in one place.

The other statements describe things SSO doesn’t guarantee. Encryption levels across apps aren’t automatically increased by SSO, auditing isn’t eliminated just because sign-in is centralized, and SSO reduces, rather than requires, separate usernames for each app.