Which mechanism allows a user to access multiple applications with a single login?

Which mechanism allows a user to access multiple applications with a single login?

• A. Single sign-on
• B. Federated login
• C. Password sharing
• D. Multi-domain login

Answer: (A)

Single sign-on lets you log in once to an identity provider, and that proof of authentication is accepted by multiple applications within the same session. After you enter your credentials, the identity provider issues a token or assertion. When you open other apps, they trust that token, so you’re automatically authenticated without re-entering a password. This reduces password prompts and centralizes security controls, while improving user experience across several apps. Federated login is related in that it enables cross-domain trust to support SSO across organizations, but the mechanism that enables one login to grant access to multiple apps is the single sign-on process itself. Password sharing is insecure and not a legitimate mechanism, and multi-domain login isn’t a standard term for this capability.

Single sign-on lets you log in once to an identity provider, and that proof of authentication is accepted by multiple applications within the same session. After you enter your credentials, the identity provider issues a token or assertion. When you open other apps, they trust that token, so you’re automatically authenticated without re-entering a password. This reduces password prompts and centralizes security controls, while improving user experience across several apps.

Federated login is related in that it enables cross-domain trust to support SSO across organizations, but the mechanism that enables one login to grant access to multiple apps is the single sign-on process itself. Password sharing is insecure and not a legitimate mechanism, and multi-domain login isn’t a standard term for this capability.