What is SNMP?
Simple Network Management Protocol (SNMP) is an Internet standard protocol for collecting and organizing information about managed devices on IP networks and for modifying that information to change device behavior. SNMP exposes management data in the form of variables on the managed systems organized in a management information base (MIB) which describe the system status and configuration.
These variables can then be remotely queried (in some circumstances, manipulated) by managing applications. There are three versions of SNMP: SNMPv1, SNMPv2 and SNMPv3. A SNMP-managed network consists of three key components:managed devices,agent and network management station (NMS).