Physical access controls are designed to restrict entry to physical areas and protect the resources within those areas. They include measures like locks, security badges, mantraps, and biometric systems. Logical controls, on the other hand, refer to mechanisms enforcing access policies in software, such as permissions, authentication methods, and firewalls. Administrative controls involve policies and procedures that govern how organizational security is managed and may include training and awareness programs. Perimeter controls focus more broadly on protecting the organization's boundaries but are not specific to data center access.