Foreword 1 Part I Routing Basics 3 Chapter 1 Basic Concepts: Internetworks, Routers, and Addresses 4 Bicycles with Motors 6 Data Link Addresses 7 Repeaters and Bridges 11 Routers 18 Network Addresses 22 Looking Ahead 25 Recommended Reading 25 Review Questions 26 Chapter 2 TCP/IP Review 28 The TCP/IP Protocol Layers 29 The IP Packet Header 32 IP A