What are some of the levels that can be set to specify the impact of the success or failure of a given log-in procedure on the overall JAAS authentication procedure?

What will be an ideal response?


Several levels can be set to specify the impact of the success or failure of a given log-in procedure on the overall authentication procedure. They are as follows:
* Required
This indicates that the log-in module must be successful. Other log-in modules will also be called even if it is not successful.
* Optional
This indicates that the log-in module can fail, but the overall log in may still be successful if another log-in module succeeds. If all the log-in modules are optional, at least one must be successful for the authentication to succeed.
* Requisite
This indicates that the log-in module must be successful, and if it fails, no other log-in modules will be called.
* Sufficient
This indicates that the overall log in will be successful if the log-in module succeeds, assuming that no other required or requisite log-in modules fail.

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