Threat Models, Onion Routing, Denial of Service, Firewalls, NAT
Educational Games
CS4G Network Simulator - an easy to understand and play simulator game that takes you through some of the most basic attacks in networking such as spoofing and a man in the middle attack
Permission Impossible - a simple drag-and-drop game designed to teach firewall concepts and rules
Blue Team - a more complicated firewall game that has you set firewall policies for multiple computers in a network, upper levels include some simple interaction with an intrusion detection system
Mockapetris, Paul, and Kevin J. Dunlap. “Development of the domain name system.” Symposium proceedings on Communications architectures and protocols. 1988.