Mike wants to block all files in the event of internal failure; what option should...

The correct answer is B. fail-close . Fail mode defines how the Threat Prevention inspection engine behaves when it is overloaded or experiences an internal failure. Check Point’s Threat Prevention Engine Settings documentation defines two options: Allow all connections (Fail-open) and Block all connections (Fail-close) . Fail-open allows connections when the engine is overloaded or fails; Fail-close blocks connections in that condition.

Because the question specifically says Mike wants to block all files if an internal failure occurs, the secure choice is fail-close. This prioritizes protection and containment over availability. It is appropriate where allowing unscanned files would be unacceptable, such as highly regulated environments, malware-sensitive segments, or traffic paths carrying untrusted downloads. The tradeoff is operational: fail-close can interrupt business traffic if the inspection engine is unavailable, overloaded, or unable to complete the decision. Fail-open is the default availability-oriented behavior because it keeps traffic moving during failure, but it permits files or connections that may not have completed inspection. “Open system” and “closed system” are not the correct Check Point Threat Prevention fail-mode terms in this context. Reference topics: Threat Prevention Engine Settings, ThreatSpect fail mode, fail-open, fail-close, inspection failure handling.