Which of the following should be considered when selecting an Intrusion Detection System (IDS)?

• A. Geography of the site; Design considerations; Animals and insects common in the vicinity
• B. The number of cameras installed
• C. The height of the fence around the site
• D. The color of the building exterior

Answer: (A)

When choosing an intrusion detection system, it’s essential to tailor it to the specific site conditions and how those conditions affect sensing and alerting. The geography of the site influences sensor placement, coverage, line of sight, terrain, climate, and how power and communication networks will be wired or wireless. Design considerations cover how the IDS will integrate with existing security layers, the types of sensors used, how alerts are monitored and responded to, scalability for future expansion, and maintenance requirements. Animals and insects in the area matter because wildlife and environmental movement can trigger false alarms or mask real threats; picking sensors and mounting methods that mitigate these risks improves reliability.

The other options don’t directly impact how the IDS should be selected. The number of cameras relates more to video surveillance design than to IDS choice, and the height of the fence or the building’s exterior color doesn’t typically influence sensor performance or integration decisions.