A technician would like to restrict when internal hardware components on the server are accessed. Which of the following server hardening techniques should the technician implement?

Implementing a chassis lock is an effective server hardening technique that restricts physical access to internal hardware components of a server. By securing the server case, the technician prevents unauthorized individuals from accessing critical components such as the motherboard, hard drives, and other peripherals. This is particularly important in environments where servers are located in shared spaces or accessible areas, as it helps protect against tampering, theft, and accidental damage.

While other options mention valuable security measures, they do not directly address physical access control in the same way that a chassis lock does. For example, an intrusion detection system monitors network traffic for suspicious activities, but it does not prevent physical access to hardware. A BIOS password can restrict access to the BIOS settings, which adds a layer of security, but it does not physically secure the hardware from being accessed. Disabling Wake-on-LAN is a network setting that prevents a server from being turned on remotely, but it does not provide any physical protection for the internal components.

In summary, a chassis lock is the most appropriate choice for restricting physical access to internal server hardware, enhancing the overall security posture of the server environment.