In a network setup, what component prevents unauthorized physical access to critical equipment?

Lockable server racks are a physical security measure designed specifically to restrict access to critical hardware such as servers and networking equipment. By using locks and keys, or combination mechanisms, only authorized personnel can access the items stored within these racks. This physical barrier helps to ensure that unauthorized individuals cannot tamper with or remove server equipment, thereby protecting sensitive data and maintaining the integrity of the network.

While other components like surveillance cameras, access control cards, and security personnel contribute to overall security, they do not provide the same level of direct physical protection. Surveillance cameras monitor and record activities, access control cards manage entry to facilities, and security personnel serve as a human presence for oversight and response. However, none of these options offer a direct barrier to physical access like lockable server racks.