: The fundamental monitoring elements. Each sensor tracks one specific metric, such as CPU load, disk space, or ping latency.
A new warning system was implemented for sensors with missing or broken lookup files , shifting from silent failures (which only generated background tickets) to visible "Warning" statuses. Security & CVE Insights prtg network monitor 21.0.x
If you are currently running version 21.0.x, planning a migration to it, or trying to understand its legacy in the shadow of newer releases, this article covers everything you need to know. : The fundamental monitoring elements