Which concept is most closely associated with using one set of credentials to access multiple platforms?

• A. Federated Identity Management
• B. Single Sign-On
• C. Remote Access Solutions
• D. Proxy Server

Answer: (B)

Single Sign-On is the idea of signing in once and then gaining access to multiple platforms without re-entering credentials. When you log in, a session or token is produced that other services recognize, so you can move between applications without repeatedly typing your password. This directly matches using one set of credentials to access several platforms, improving convenience and reducing password fatigue.

Federated Identity Management is broader, focusing on how different organizations’ identity systems trust each other so users from one domain can access resources in another. SSO is the mechanism that often makes that seamless, but the situation described in the question is best captured by the one-sign-on concept itself. Remote Access Solutions deal with connecting to a network from afar, and a Proxy Server acts as an intermediary for requests—neither describes the single-credential access to multiple platforms.