Cyberspace may well be the “great equalizer” where nation states and non-state actors can wield cyberpower and compete on relatively equal terms. Leveraging current views and uses of cyberpower, this chapter redefines cyberspace and introduces a three-dimensional model that expresses how cyberpower can be exercised. The model, which is divided into distinct layers, each with its own unique characteristics, offers a notion of distance through a view of cyberspace that introduces the concepts of near, mid and far space. Cyberpower is examined from the perspective of national security. A range of prominent cyber attacks are qualitatively assessed and compared within the context of the model.