What is provided by the fail open and close functionality of Snort IPS?

blocks the traffic flow or bypasses IPS checking in the event of an IPS engine failure
keeps track of the health of the Snort engine that is running in the service container
provides the ability to automatically disable problematic signatures that routinely cause false positives and pass traffic
keeps Snort current with the latest threat protection and term-based subscriptions

Answers Explanation & Hints:

The Snort IPS fail open and close functionality can be configured to block the traffic flow or to bypass IPS checking in the event of IPS engine failure.