The main SNMP entities are:
1. SNMP Agent: The device or software component that provides information to SNMP Managers.
1. SNMP Manager: The device or software component that collects and manages information from SNMP Agents.
1. Managed Object: The network device or parameter being managed by SNMP.
1. SNMP Protocol: The communication protocol used by SNMP Agents and Managers to exchange information.
1. MIB (Management Information Base): The database maintained by SNMP Agents that contains the managed objects they provide access to.
1. OID (Object Identifier): The unique identifier assigned to each managed object in the MIB.
