Applied Methods and Techniques Flashcards

Which approach to physical security layers protective measures so that defeating one layer does not compromise the asset?

Answer: Defense in depth (concentric circles of protection)

Defense in depth places multiple layers between an adversary and the asset.

An access control system is tuned so tightly that authorized employees are often rejected. Which error rate is too high?

Answer: False rejection rate (Type I error)

A false rejection (Type I error) occurs when a legitimate user is denied access.

What is the main benefit of a security officer post order?

Answer: It defines the specific duties, authority, and procedures for a particular post

Post orders give officers written, post-specific instructions on duties and procedures.

When evaluating a proposed countermeasure, which analysis compares its total cost with the reduction in expected loss?

Answer: Cost-benefit analysis

Cost-benefit analysis checks whether the loss reduction justifies the countermeasure's lifecycle cost.

Which intrusion detection sensor detects movement by measuring changes in infrared energy within its field of view?

Answer: Passive infrared (PIR) sensor

PIR sensors detect changes in thermal (infrared) energy caused by a moving warm body.

Why are dual-technology sensors, such as PIR combined with microwave, often deployed?

Answer: They reduce nuisance alarms because both technologies must trigger

Requiring both technologies to activate greatly lowers false and nuisance alarms.

In security system procurement, what is the main purpose of a Request for Proposal (RFP)?

Answer: To solicit detailed vendor solutions and pricing against defined requirements

An RFP describes requirements and invites vendors to propose solutions and prices for comparative evaluation.