Roles of SNMP on the firewall

Simple Network Management Protocol (SNMP) has three roles.
�?Network management system (NMS)
The NMS sends all types of query packets to managed devices and receives alarms sent from managed devices.
�?Agent
The agent is a process that resides on managed devices.
The functions of the agent are as follows:
The agent receives and parses query packets sent from the NMS.
The agent reads or writes management variables based on the packet type, and generates and returns response packets to the NMS.
Based on the alarm conditions defined on each protocol module, when alarm conditions are met, for example, entry to or exit from the system view or device restart, the corresponding module active sends an alarm of such events to the NMS through the agent.
�?Managed device
Managed devices are managed by the NMS, and generate and report alarms.

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