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A MIB is a formatted text file that contains the lists of all the network data objects used by a network component device.

A management information base (MIB) is a database used for storing the entities in a communication network.

A Management Information Base (MIB) is a collection of formally described network objects. Each network objects represents a particular type of information. SNMP access and manages the MIB network objects.

Importance of MIB:

A component of a network device must be described in the MIB, else there is no existence of that network device component.
For example:
A temperature sensor will of a network device will works, if they are described in MIB file.

How MIB works:

  • The device manufacturer will supply a MIB file with device.
  • Load MIB file into SNMP manager.
  • SNMP manager will use the MIB to interpret the incoming messages from newly connected device.