What second-factor methods can a risk-based rule in Identity Authentication enforce?

What are the common methods of two-factor authentication?

What are the default-action options for a risk-based authentication rule, and when does the default apply?

What conditions can a conditional authentication rule match on?

What is risk-based authentication?

What are the three parts of a JSON Web Token (JWT)?

In SAML, what is the difference between an identity provider and a service provider?