A COMPLETE SNMP system consists of the FOLLOWING parts:-
SNMP Manager - A network MANAGEMENT system that uses SNMP to poll and receive data from any number of network devices. The SNMP manager usually is an application that runs in a central location.
SNMP Agent - A process that runs on the network DEVICE being monitored. All types of data are gathered by the device itself and stored in a local database. The agent can then respond to SNMP POLLS and queries with information from the database, and it can send unsolicited alerts or “traps” to an SNMP manager.

A complete SNMP system consists of the following parts:-
SNMP Manager - A network management system that uses SNMP to poll and receive data from any number of network devices. The SNMP manager usually is an application that runs in a central location.
SNMP Agent - A process that runs on the network device being monitored. All types of data are gathered by the device itself and stored in a local database. The agent can then respond to SNMP polls and queries with information from the database, and it can send unsolicited alerts or “traps” to an SNMP manager.