Which of the following is a common vulnerability in physical security assessments?

Inadequate training of personnel regarding security protocol is a common vulnerability in physical security assessments because personnel are often the first line of defense against security breaches. Without proper training, employees may not fully understand security procedures, leading to mistakes that can compromise the security of physical assets. This can involve failing to recognize unauthorized access, not properly securing sensitive areas, or not following protocols for reporting security incidents.

Effective training programs are crucial as they equip employees with the knowledge and skills to recognize potential threats and respond appropriately. Personnel who are well-informed about security protocols are more likely to follow them correctly and consistently, thus reducing vulnerabilities within the organization's physical security framework.