Which of the following best describes an inactive system?

An inactive system is best described as one that has not been detected by a sensor for a determined period. This indicates that the system is not currently active within the monitored environment. Inactive systems generally do not generate any traffic or communicate with network services, leading to them being undetected by the monitoring systems for a set amount of time.

The other options describe scenarios that imply the system is operational or active. An ePO server managing a system suggests an active management status. An installed Trellix Agent that communicates regularly indicates the system is active and functioning within the network. A fully operational and monitored system definitely does not align with the definition of an inactive system, as being monitored involves ongoing interaction and detection by security mechanisms. Thus, the definition of an inactive system hinges on the lack of detection or communication over a designated timeframe.