Exam 1Y0-312 topic 1 question 65 discussion

Scenario: A user from the 'test.com' domain is browsing a StoreFront server from the 'corp.com' domain with URL: https://sf.corp.com. The user notices that the browser redirects to a server with URL: https://apps.test.com and again back to https://sf.corp.com. The user logged into the StoreFront store without getting any authentication prompt.
__________ is the Identity provider and __________ is the authentication method used in this scenario.