Which security measure alerts technical staff if there is interference with the system?

Which security measure alerts technical staff if there is interference with the system?

• A. Firewall
• B. Intrusion detection system
• C. Data backup
• D. User training

Answer: (B)

An intrusion detection system is designed to watch for unusual or unauthorized activity and immediately raise alerts to technical staff. By continually monitoring network traffic and system behavior for patterns that look suspicious or match known attack signatures, it can notify admins as soon as interference is detected. That real-time alerting is what helps responders act quickly to potential breaches or disruptions. A firewall blocks access at the network boundary, which helps prevent interference but doesn’t provide ongoing alerts about ongoing interference inside the system. Data backups are about preserving and restoring data after an incident, not about detecting or signaling that something is happening in real time. User training reduces the chance of human error but doesn’t itself detect or alert to system interference.

An intrusion detection system is designed to watch for unusual or unauthorized activity and immediately raise alerts to technical staff. By continually monitoring network traffic and system behavior for patterns that look suspicious or match known attack signatures, it can notify admins as soon as interference is detected. That real-time alerting is what helps responders act quickly to potential breaches or disruptions.

A firewall blocks access at the network boundary, which helps prevent interference but doesn’t provide ongoing alerts about ongoing interference inside the system. Data backups are about preserving and restoring data after an incident, not about detecting or signaling that something is happening in real time. User training reduces the chance of human error but doesn’t itself detect or alert to system interference.