| SNMP | Trap |
|---|---|
| Pull Model: Monitoring System (e.g. Manage Engine OpManager) sends SNMP request to the SNMP agent running on the monitored device (e.g. Cisco Switch) and receives the response. | Push Model: SNMP agent running on the monitored device sends messages in the form of traps to the trap destination. |
| Communication happens both ways. UDP port 161 is used. | One way communication from device to trap destination. UDP port 162 is used. |
| SNMP requests can be scheduled on specific intervals. | Traps are spontaneous. They will reach the destination as soon as they are generated. |
| SNMP community string is mandatory to get a SNMP response. | Community string is not mandatory to receive the trap message. |
SNMP vs Trap
