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CCDA notes : cont.. 17. ISO defines five types of network management processes. These are (remembered as FCAPS): 1.      Fault Management -          This is a vital function of a network management system. Fault management consists of fault detection, correction, and verification checks on a fault. Since any fault directly impacts the quality of service, automatic fault detection and correction need to be implemented where possible.  In addition, fault management should include virus prevention, and regular backups. 2.      Configuration Management -          Configuration management facilitates management of hardware and software resources more efficiently. In a large computer network, there can be several versions of software and hardware resources giving rise to difficulty in troubleshooting and/or upgrading the systems. The database is made easily accessible to attend to maintenance/ up gradation procedures in a timely and efficient manner.   3.      Accounting Management -          This function helps in fair use of resources. For example, network bandwidth utilization by individual groups can be measured and appropriate quotas can be assigned depending on the requirement and fair usage. It also enables billing based on the resource usage.   4.      Performance Management -          This includes collecting the network parameters of interest, such as bandwidth utilization, packet errors, retransmissions etc.  A baseline is established during normal traffic flow. Performance threshold are established, against which the measured parameter values are compared for acceptable network performance. If any non-compliance is determined, the network management station is alerted by visual, audio, logger, and/or by email alerts. 5.      Security Management -          Security management refers to the control of access to the network resources. The internal network resources should be made available only to authorized users or systems as per the given criteria. All attempts to access the resources without appropriate authorization to a given resource need to be logged or an alarm may be given, depending on the requirement. There can be different levels of access, depending on the user type, such as internal or external. Also, if the corporate network is participating in Internet or extranet, added levels of security are required.