I. Introduction
Telecommunications networks management refers to the coordination of all resources needed for processes such as: designing, planning, controlling, simulating, generating, implementing, analyzing, monitoring, measuring and testing. The final user will get proper services at adequate costs by optimally distributing the capacities [1]. While monitoring the network, the administrator receives periodical information about the quality of services currently running, as well as about the status of the system. Some examples of such software monitoring tools are briefly enumerated herein. The PRTG Network Monitor created by Paessler AG (Germany) relies on SNMP (Simple Network Management Protocol), WMI (Windows Management Instrumentation), packet sniffing and Netflow, having more than 150 sensor types. It has support to monitor almost all network parameters: uptime/downtime, transfer rate, SLA (Service Level Agreement), QoS (Quality of Service) etc. Colasoft offers a back-in-time network analysis server software called nChronos, suitable for capturing and storing the packets for a long period of time. Later on it performs packet retrieving and data mining, as well as in-depth network analysis for forensics. The same producer offers also a real-time portable network analyzer for LAN and WLAN called Capsa [6]. Microsoft uses for a long time its Network Monitor tool, but nowadays its competitor Wireshark is more popular. ONPM (Orion Network Performance Monitor), Zenoss, snort, Splunk etc. could be also taken into consideration.