Introduction.- Characteristics and Characterization of Information Networks.- Drivers of the Telecommunication Industry.- Graph Theoretic Characterization of Communication Networks.- Small World and Scale-free Networks.- Characterization of Telecommunication Traffic.- Bandwidth and Throughput of Networks: Circuit Switched Networks.- Bandwidth and Throughput of Networks: Packet Switched Networks.- Pricing of Telecommunication Services.- Pricing of Circuit Switched Services.- Pricing of Packet Switched Services.- Regulation.- Net Neutrality.- Game Theory and its Application to Communication Networks.- Multi-service Network Models.- Subsidy-free prices in Class-based Networks.- Market-clearing prices in Class-based Networks.- A Constant Revenue Model for Net Neutrality.- A Constant Revenue Model for Packet Switched Networks.- A Two-step Quality of Service Provisioning in Multi-class Networks.- Network of the Future.- Conclusion.