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This chapter begins with a description of the network management functional areas of the ISO network management model, which cover configuration management, fault management, performance management, accounting management and security management. Next comes a description of some hardware and software tools that are used for network management. We then look at some ways of troubleshooting networks. We investigate the important simple network management protocol (SNMP), a TCP/IP application-layer protocol that makes it easy for management information to be exchanged between network devices. We also take a look at the equally important variant of SNMP, remote monitor (RMON). In the next section, the value of good network documentation is stressed. The chapter ends with a short section on LAN server administration.
As networks become more and more complex, they can become more and more difficult to maintain. The users of a network tend to rely on it heavily and will suffer if it is not running efficiently or if certain applications are unavailable when needed. So the network manager must manage the network proactively, using all the management facilities at his or her disposal.
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