Which of the following can be configured so that when an alarm is activated, all doors lock and the suspect or intruder is caught between the doors in the dead-space?

Question

Options

• AMan trap
• BBiometric device
• CHost Intrusion Detection System (HIDS)
• DNetwork Intrusion Detection System (NIDS)

• A
  93% (37)
• C
  3% (1)
• D
  5% (2)

Explanation

A man trap is a physical security control consisting of a small, enclosed space with two sets of interlocking doors - when an alarm triggers, both doors lock simultaneously, trapping the intruder in the dead-space between them until authorities arrive. This makes it ideal for high-security entry points like data centers or secure facilities.

Why the distractors are wrong:

• B. Biometric device - authenticates identity (fingerprint, retina scan) but does not physically contain intruders; it controls access, not capture.
• C. HIDS - monitors a single host for suspicious activity (file changes, log anomalies) and generates alerts; it has no physical mechanism.
• D. NIDS - monitors network traffic for intrusion signatures; it's entirely software/network-based and cannot lock doors.

Memory tip: Think of a man trap like a "physical firewall" - just as a firewall sits between two network zones and controls what passes through, a man trap sits between two physical zones and stops unauthorized passage. The word "trap" itself is the giveaway: it's designed to catch someone, not just detect or authenticate.

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