This makes them valuable-if not necessary-assets for network monitoring. SNMP traps are unique because they’re the only notification method SNMP agents can initiate. These emergency notifications are known as SNMP traps. However, if an agent detects certain emergency conditions or events, it’ll send a warning notification to the manager without a prior request for data.
![synology nas snmp trap receiver synology nas snmp trap receiver](https://static.centreon.com/wp-content/uploads/2017/08/2_PP_Synology-1024x342.png)
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Normal SNMP operations designate that device agents take passive roles, which means they’ll only send SNMP messages if the SNMP manager sends a request.