Which of the following two are the most important aspects of physical access control to computer equipment?

The most important aspects of physical access control to computer equipment are aimed at preventing unauthorized access to sensitive areas where such equipment is located. A card entry system is a significant method because it utilizes technology to manage who enters a secured location. This method not only restricts access to authorized personnel but also maintains a log of who accessed the premises and when. This accountability is crucial for tracking potential security breaches and ensuring that only individuals with the correct credentials can enter secure areas.

On the other hand, while other options like security guards, door locks, and intruder alarms play important roles in security, they do not provide the same combination of convenience, tracking, and control that a card entry system does. Security guards can deter unauthorized access but cannot consistently enforce entry without proper processes. Door locks are essential but can be bypassed or may not provide an adequate record of access events. Intruder alarms serve to alert personnel of unauthorized access, but they do not control who enters and exits the premises proactively.

In sum, a card entry system stands out as a vital aspect of physical access control due to its combination of security, access management, and monitoring capabilities.