A principal component of network management is the MIB. This is the schema used by the NMS to understand the data maintained by the managed NEs. Think of a MIB as a large collection of defined data objects that are of interest to network management. The MIB is shared by both the NMS and the NEs, but the NEs actually implement and maintain the values of the managed object instances. The NMS uses the MIB schema to understand the NE-resident MIB objects.