Intrusion detection is defined as the?

Intrusion detection is defined as the?

• A. Monitoring of premises for security events.
• B. Alarm notification after a breach.
• C. Detection of a person or vehicle attempting to gain unauthorized entry.
• D. Preventing entry to restricted areas.

Answer: (C)

Intrusion detection is about recognizing attempts by unauthorized persons or vehicles to enter a protected area. It uses sensors, cameras, and access-control signals to detect the act of trying to breach a boundary so security personnel can respond promptly. This is more specific than general monitoring of premises for security events, which covers a broader set of activities and isn’t limited to entry attempts. It also differs from alarm notification after a breach, which occurs after detection, and from preventing entry, which is the job of access control rather than detection itself.

Intrusion detection is about recognizing attempts by unauthorized persons or vehicles to enter a protected area. It uses sensors, cameras, and access-control signals to detect the act of trying to breach a boundary so security personnel can respond promptly. This is more specific than general monitoring of premises for security events, which covers a broader set of activities and isn’t limited to entry attempts. It also differs from alarm notification after a breach, which occurs after detection, and from preventing entry, which is the job of access control rather than detection itself.