A network administrator is configuring a new firewall. To prioritize security, the firewall is set up to block all network traffic if the device experiences a critical error or power loss. This configuration is an example of which concept?
Fail-open
Fail-closed
Fail-safe
Fail-on
When a system is configured to be fail-closed, also known as fail-secure, it defaults to a secure state upon failure. In this state, it will deny access or block all traffic to prevent potential security breaches. This contrasts with a fail-open system, which would allow traffic to pass through, prioritizing availability over security.
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