What are the three types of End-User authentication options available?

The three types of End-User authentication options are widely recognized for their effectiveness in ensuring secure access to systems while offering flexibility to users. Username/password authentication is a traditional method that requires users to enter a unique identifier and a secret password to gain access. This method is familiar to most users and allows for personal customization of credentials.

Social Login is an increasingly popular authentication method that allows users to log in using their existing social media accounts, such as Facebook or Google. This not only simplifies the login process by reducing the number of credentials users need to remember, but it can also facilitate quicker access and onboarding for new users.

Single Sign-On (SSO) is another vital authentication option that allows users to log in once and gain access to multiple applications or services without needing to re-enter credentials. This enhances user experience by streamlining access while maintaining robust security standards.

The other choices present alternative authentication methods, but they do not accurately encompass the three core types recognized within Zendesk's framework for End-User authentication. Each of these authentication methods supports different use cases and preferences, making them significant in creating secure and user-friendly environments for customer interactions.