Video surveillance capability is a key security control used as part of a layered physical defense at a cloud hosting site. Managing Cloud principles explain that physical security relies on multiple overlapping controls to deter, detect, and respond to unauthorized physical access.

Video surveillance provides continuous monitoring of data center facilities, including entrances, exits, server rooms, and perimeter boundaries. It acts as both a deterrent and a detection mechanism, enabling real-time observation and post-incident investigation. Surveillance footage supports incident response, forensic analysis, and compliance requirements.

Access control enforcement and multifactor authentication are primarily logical or administrative controls, while background checks are personnel security measures. Although important, they are not physical perimeter controls. Therefore, video surveillance capability is the correct answer.