Which policy only blocks known dangerous services or behaviors while allowing everything else?

The correct answer is the Promiscuous Policy, which is designed to allow all traffic and activities except for those that are explicitly identified as dangerous. In this approach, the system monitors and filters out only the known malicious services or behaviors, essentially creating a safe environment by default that only denies specific threats. This enables organizations to maintain a higher level of operational functionality, as legitimate traffic is not hindered unless it is recognized as a threat.

In contrast, a Permissive Policy tends to allow most activities, but it may not focus specifically on blocking only dangerous behaviors. A Paranoid Policy would typically be more restrictive, blocking many services and actions that may be considered suspect but not necessarily harmful. The Prudent Policy is often balanced but does not explicitly focus on only blocking known threats; it may be more conservative in its overall approach to network permissions.

In summary, the Promiscuous Policy exemplifies the tactic of only blocking known threats while allowing all other traffic, making it a robust choice for environments where flexibility and functionality are crucial, as long as they are diligent in maintaining threat awareness.