What item should an Architect consider when designing a Delegated Authentication implementation?

Northern Trail Outfitters (NTO) has an off-boarding process where a terminated employee is first disabled in the Lightweight Directory Act Protocol (LDAP) directory, then requests are sent to the various application support teams to finish user deactivations. A terminated employee recently was able to login to NTO's Salesforce instance 24 hours after termination, even though the user was disabled in the corporate LDAP directory.
What should an identity architect recommend to prevent this from happening in the future?

A farming enterprise offers smart farming technology to its farmer customers, which includes a variety of sensors for livestock tracking, pest monitoring, climate monitoring etc. They plan to store all the data in Salesforce. They would also like to ensure timely maintenance of the Installed sensors. They have engaged a salesforce Architect to propose an appropriate way to generate sensor Information In Salesforce.
Which OAuth flow should the architect recommend?

A global company's Salesforce Identity Architect is reviewing its Salesforce production org login history and is seeing some intermittent Security Assertion Markup Language (SAML SSO) 'Replay Detected and Assertion Invalid' login errors.
Which two issues would cause these errors?
Choose 2 answers

A consumer products company uses Salesforce to maintain consumer information, including orders. The company implemented a portal solution using Salesforce Experience Cloud for its consumers where the consumers can log in using their credentials. The company is considering allowing users to login with their Facebook or Linkedln credentials.
Once enabled, what role will Salesforce play?