How does Salesforce handle user authentication?

Salesforce provides a robust and flexible approach to user authentication by supporting various methods, including Single Sign-On (SSO). This means that users can authenticate using different identity providers and methods, which enhances the user experience and security. SSO simplifies the login process, allowing users to access multiple applications after logging in once, which reduces the need to remember numerous passwords.

Additionally, Salesforce supports other authentication methods such as social login, two-factor authentication (2FA), and OAuth, allowing organizations to choose the method that best fits their security requirements and user preferences. This versatility is crucial for enterprises that operate in different environments and need to integrate with various systems while maintaining security and ease of access for their users.

The other options do not reflect the breadth of Salesforce's authentication capabilities. Password-only logins or a single method would limit flexibility and might not meet the diverse needs of organizations today, while requiring frequent password changes could lead to user frustration and decreased security as users may resort to weaker passwords or password management issues.