1. A method of managing networks, the method comprising: defining characteristics of a set of managed objects of each of the networks to be managed, to allow the set of managed objects to be identified by a managed object profile where the managed objects are in addition to sensors nodes of the networks; sending a request for characteristic information about the set of managed objects to an agent of the networks to be managed; and recognizing manageable managed objects based on a transmitted managed object profile included in the characteristic information representing the managed objects which is transmitted from the agent in response to the request; wherein the recognizing of the managed objects comprises obtaining the set of managed objects corresponding to the information representing the managed objects from a local database accessible by a network manager and determining whether the obtained set of managed objects are manageable.