The correct answer is: "When a firewall encounters a failure, it ceases to pass any traffic, effectively isolating the internal network." This is a fail-closed situation, meaning the device "fails secure" by blocking all traffic if something breaks.
Why the other choices are incorrect:
"A malfunctioning firewall defaults to allowing all inbound and outbound traffic without restriction." This is fail-open, prioritizing availability over security.
"A network monitoring system alerts administrators when a failure in the intrusion detection system is detected." Alerting alone does not describe the device's traffic-handling behavior when it fails.
"A critical server automatically reboots itself in response to an application crash to maintain service availability." This concerns service continuity, not traffic blocking or allowing on failure.
Ask Bash
Bash is our AI bot, trained to help you pass your exam. AI Generated Content may display inaccurate information, always double-check anything important.
What is a fail-closed mechanism in network security?
Open an interactive chat with Bash
How does fail-closed differ from fail-open in security systems?
Open an interactive chat with Bash
Why is it important for firewalls to have a fail-closed configuration?