This is a concrete base class for representing hardware devices that can be managed that contains one or more sub-ordinate devices. In other words, this physical device is not a stand-alone physical device; rather, it represents an aggregation of physical devices. Each physical device in this aggregation can be managed.<br/><br/>This class represents a convenient aggregation point for combining different aspects of a device (e.g., its physical composition as well as the set of services that it offers). It also enables the device itself to have a physical manifestation. Examples of this class include routers and switches, computers, and other end-devices that are managed.<br/>