The page below is from the manual of PRTG, our quick-to-install and easy-to-use network monitoring software
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PRTG Manual: Understanding Basic Concepts
There is a number of basic concepts that are essential for understanding the functionality and ease of use of PRTG Network Monitor. We have made using our software as easy-to-use as possible. Setting it up for the first start and getting first monitoring results happens almost automatically.
Nevertheless, there are some basic principles we would like to explain to you. Please read these sections carefully to understand the underlying workflow like architecture of the monitoring system, hierarchy of objects, settings inheritance, and notifying. You will be able to enhance your monitoring experience permanently as soon as you know the basic principles of PRTG!