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Network
management refers
to the activities, methods, procedures, and tools that pertain to the
operation, administration, maintenance, and provisioning of networked systems. The
functions performed by a network management system can be categorized into the following
five areas:-
· Fault
management: - The
goal of fault management is to detect, log, notify users of, and automatically
fix network problems to keep the network running effectively. Because faults
can cause downtime or unacceptable network degradation, Fault management involves
first determining symptoms and isolating the problem. Then the problem is fixed
and the solution is tested on all-important subsystems.
· Configuration
management: - The
goal of configuration management is to monitor network and system configuration
information so that the effects on network operation of various versions of
hardware and software elements can be tracked and managed.
· Accounting
management: - The
goal of accounting management is to measure network utilization parameters so
that individual or group uses on the network can be regulated appropriately.
· Performance
management: -
The goal of performance management is to measure and make available various
aspects of network performance so that internetwork performance can be
maintained at an acceptable level. Example includes network throughput, user response
times, and line utilization.
· Security
management: -
The goal of security management is to control access to
network
resources according to local guidelines so that the network cannot be sabotaged
(intentionally or unintentionally) and sensitive information cannot be accessed
by those without appropriate authorization. A security management subsystem,
for example, can monitor users logging on to a network resource and can refuse
access to those who enter inappropriate access codes.
v
Network
contains number of managed devices such as routers, bridges, switches, and hosts
v
Network
management involves monitoring and altering the configuration of such devices.
v
An
Agent is a part of network management system that resides in a managed device.
v
Agents
provide management information about the managed device and to accepts instructions
for configuring the device.
v
Network
management station provides graphical view of the entire system.
v
The
manager exchanges management information with agent by using a network management
protocol.
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