The MIB (Management Information Base) is a virtual information base for network
management. There are large volumes of information for the managed network equipment.
In order to uniquely identify a specific management unit in the SNMP message, the tree
hierarchy is used to by the MIB to describe the management units in the network
management equipment. The node in the tree indicates a specific management unit. Take
the following figure of MIB as an example to name the objectives in the tree. To identify a
specific management unit system in the network equipment uniquely, a series of numbers
can be used. For instance, the number string {1.3.6.1.2.1.1} is the object identifier of
management unit, so the MIB is the set of object identifiers in the network equipment.
Figure 25-2 MIB tree hierarchy
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