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Introduction Chapter 1 Living in a Network-Centric World Objectives Key Terms Communicating in a Network-Centric World Networks Supporting the Way We Live Examples of Today s Popular Communication Tools Networks Supporting the Way We Learn Networks Supporting the Way We Work Networks Supporting the Way We Play Communication: An Essential Part of Our Lives What Is Communication? Quality of Communication The Network as a Platform Communicating over Networks Elements of a Network Converged Networks The Architecture of the Internet The Network Architecture Fault-Tolerant Network Architecture Scalable Network Architecture Providing Quality of Service Providing Network Security Trends in Networking Where Is It All Going? Networking Career Opportunities Summary Activities and Labs Check Your Understanding Challenge Questions and Activities To Learn More Chapter 2 Communicating over the Network Objectives Key Terms The Platform for Communications The Elements of Communication Communicating the Messages Components of the Network End Devices and Their Role on the Network Intermediary Devices and Their Role on the Network Network Media LANs, WANs, and Internetworks Local-Area Networks Wide-Area Networks The Internet: A Network of Networks Network Representations Protocols Rules That Govern Communications Network Protocols Protocol Suites and Industry Standards Interaction of Protocols Technology-Independent Protocols Using Layered Models The Benefits of a Layered Model Protocol and Reference Models TCP/IP Model Communication Process Protocol Data Units and Encapsulation Sending and Receiving Process OSI Model Comparing the OSI Model to the TCP/IP Model Network Addressing Addressing in the Network Getting Data to the End Device Getting Data Through the Internetwork Getting Data to the Right Application Summary Activities and Labs Check Your Understanding Challenge Questions and Activities To Learn More Chapter 3 Application Layer Functionality and Protocols Objectives Key Terms Applications: The Interface Between the Networks OSI and TCP/IP Model Application Layer Software User Applications, Services, and Application Layer Protocols Application Layer Protocol Functions Making Provisions for Applications and Services Client/Server Model Servers Application Layer Services a