Deploying mantraps in the data center adds an additional layer of security by allowing only one person to pass through at a time and often includes authentication measures to verify the person's identity before granting access. This is effective in preventing tailgating, where an unauthorized person might follow an authorized person into a restricted area. Surveillance cameras can deter and record unauthorized access attempts, but they do not actively prevent entry. Badge systems can be effective but have the weakness of being susceptible to cloning or loss, thus potentially allowing unauthorized access if not combined with other controls like biometrics. While security guards provide a human element of security, mantraps enhance this by ensuring individuals cannot bypass checks performed by the guards.