Which command helps determine what devices and IP addresses are connecting to the FortiAnalyzer?

The command that effectively helps determine what devices and IP addresses are connecting to the FortiAnalyzer is indeed related to diagnostic testing. The command that is specifically designed to query the device connections on the FortiAnalyzer is appropriate as it allows for an in-depth look at the active connections involving the FortiAnalyzer.

Using tools like 'diagnose test application oftpd 3' provides direct insight into the underlying operation of the OFTP daemon, which is responsible for handling connection requests from devices. This command facilitates examination of the connection status, enabling administrators to see which devices are linking to the FortiAnalyzer and their corresponding IP addresses.

The other options, while related to logging and packet sniffing, do not provide the direct management or status overview of active connections in the same manner. Commands for reviewing logs or sniffing traffic are more focused on historical data or real-time data capture than on directly listing current connections to the FortiAnalyzer itself. Thus, the selected command serves a specific purpose of determining active connections and is crucial for monitoring the system effectively.