Abstract: “A network is comprises of many things as infrastructure components, network protocols, applications, services, servers, and network infrastructure. Due to the fast development of technologies the complexity level to manage the networks are a challenging job now a days. For large networks it is a tedious task to monitor the entire network manually from different aspects and to correct the faults at its earlier or to prevent effectively the faults to occur.”

Keywords: Network Monitoring, n e t work Troubleshooting, faultdetection ,QoS , Open Source Network Monitoring Tools