A basic reason why we monitor the performance of a system is to define the overall state of the machine ("It's Ok or "It's slow" etc). In other words to determine whether the system is experienceing a bottleneck or not. This paper investigates the application of Self Organizing Maps (SOM) and Expert System (ES) in the network performance management area. A system is proposed which collects data from certain server and processes the data in order to get knowledge concerning the current network pe
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