Connecting Networks v6 Companion Guide [Hardcover]

Cisco Networking Academy is an innovative Cisco education initiative that delivers information and communication technology skills to improve career and economic opportunities around the world. The Academy provides online courses, interactive tools, and lab activities to prepare individuals for information technology and networking careers in virtually every industry.

Introduction xix

Chapter 1WAN Concepts 1

Objectives 1

Key Terms 1

Introduction (1.0) 3

WAN Technologies Overview (1.1) 3

    Purpose of WANs (1.1.1) 3

        Why a WAN? (1.1.1.1) 3

        Are WANs Necessary? (1.1.1.2) 4

        WAN Topologies (1.1.1.3) 5

        Evolving Networks (1.1.1.4) 8

        Small Office (1.1.1.5) 8

        Campus Network (1.1.1.6) 9

        Branch Networks (1.1.1.7) 10

        Distributed Network (1.1.1.8) 11

    WAN Operations (1.1.2) 13

        WANs in the OSI Model (1.1.2.1) 13

        Common WAN Terminology (1.1.2.2) 14

        WAN Devices (1.1.2.3) 16

        Cil3