Preface: The Seven Unanswered Questions xiii Chapter 1: Foundations for Network Architecture 1 Chapter 2: Protocol Elements 23 Chapter 3: Patterns in Protocols 57 Chapter 4: Stalking the Upper-Layer Architecture 97 Chapter 5: Naming and Addressing 141 Chapter 6: Divining Layers 185 Chapter 7: The Network IPC Model 235 Chapter 8: Making Addresses Topological 283 Chapter 9: Multihoming, Multicast, and Mobility 317 Chapter 10: Backing Out of a Blind Alley 351 Appendix A: Outline for Gedanken Experiment on Separating Mechanism and Policy 385 Bibliography 389 Index 399