Introduction about SNMP
Simple Network Management Protocol (SNMP) is an application-layer protocol that provides a message format for communication between SNMP managers and agents. SNMP provides a standardized framework and a common language used for the monitoring and management of devices in a network.
The SNMP framework has three parts:
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SNMP manager - The SNMP manager is used to control and monitor the activities of network hosts using SNMP.
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SNMP agent - The SNMP agent is the software component within the managed device that maintains the data for the device and reports these data, as needed, to managing systems.
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MIB - The Management Information Base (MIB) is a virtual information storage area for network management information, which consists of collections of managed objects.
A manager can send the agent requests to get and set MIB values. The agent can respond to these requests. Independent of this interaction, the agent can send unsolicited notifications (traps or informs) to the manager to notify the manager of network conditions.