In this module, students examine the physical side of cybersecurity, learning how organizations layer controls to protect buildings, devices, and data. They explore security control types and functions, study real-world breaches like the 2013 Target attack, and investigate surveillance cameras, motion sensors, and entry logging as detection tools. Along the way, students apply defense-in-depth thinking to hands-on design challenges and grapple with the privacy and bias implications of facial recognition technology.