Computer and communication networks are an integral part of our business and personal lives, and we need our networks to work reliably and efficiently. However, just like anything that is designed and built by people, networks too are subject to equipment failure, power outages, and unexpected demand that can cause delays in communication. For these reasons our networks have to be monitored and managed on an ongoing basis.
Even if you have only a very basic knowledge of how networks work, you probably have some feel for how complex the task of managing a modern computer network is. In most large private networks the Information Technology Group is given the task of designing, building, monitoring and managing the network. Among the valuagle tasks that these IT groups perfrom are initial network planning, configuration management, fault management, security management, performance management.