Cybersecurity is a primary national security concern. Government owned, government operated and private networks and systems, as well as the data in these systems, are being exploited by a variety of actors, groups, and states. Perpetrators target these systems in order to engage in cybercrime, espionage, disinformation campaigns, disruption of essential services, destruction of critical infrastructure, and the deletion, theft or alteration of data. The government, military and private sector have various roles and responsibilities with regard to the protection of the cyber domain. In this course, students critically evaluate these roles and responsibilities, the manner in which government networks, systems, and data are secured, and the ability of national and international cybersecurity strategies and partnerships to provide effective and efficient protection of the fifth domain.