This paper describes a component-based design for a virtual network construction and simulation tool to be used for educational purposes. In this study, the elemenfs o f a compurer n e~o r k are defined in terms o j discrete objects. It presents the component hierarchy and design requirements far modeling a network, and describes the means by which rhese objects can be modeled and instantiated us simulated network components using XML and Java. Following an overview of the elements os the u4ADNET (Military Academy AtturWDefense Network) project and a discussion of its goah and requirements, the components required to build a virtud network are defined, Jili'owed by implementation details and additional design considerations. 1 . 2.