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Understanding Data Communications, 7th Edition

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Understanding Data Communications, 7th Edition


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    • Copyright 2002
    • Dimensions: 7-3/8" x 9-1/8"
    • Pages: 784
    • Edition: 7th
    • Book
    • ISBN-10: 0-672-32216-1
    • ISBN-13: 978-0-672-32216-7

    Understanding Data Communications, Seventh Edition is the modern bible of data communications. It covers how data communications systems and their various hardware and software components work. In addition to this, the concepts covered allow the reader to access their current forms of data communication to determine systems best suit their current needs. Covering a vast range of topics from data networking to data communication security, this book focuses on the present and future of data communications. New material from the previous edition includes wireless technologies and security. The author provides a basis for understanding data communications in general, and provides expertise on setting up and securing types of communications systems. Organized like it's highly successful 6th edition, this book can be tailored to the needs of both the computer professional and student. It approaches data communications in a tutorial format, challenging the reader with questions following every chapter to assess what has been learned. In addition to this, the author provides additional resources to the computer professional that wants a more in-depth account of specific concepts.

    Sample Content

    Online Sample Chapter

    Data Communications: Use the Right Medium for your Message

    Table of Contents

    (NOTE: Each chapter concludes with What You Have Learned and a Quiz.)


    Who This Book Is For. This Book's Approach to Data Communications.

    1. An Overview of Data Communications.

    The Importance of Data Communications. The First Data Communications Systems. Two-State Communications Systems. Early Communications Codes. Modern Codes. Teleprinters. Data Communications in Computing. Changes in the Industries. General Description of Data Communications Systems. What You Have Learned.

    2. Terminal Devices.

    Teleprinters. Teleprinters Versus CRT Terminals. Serial Printers. CRT Terminals. Parts of a Terminal. PC Terminals. The Need for Speed. Data Transmission.

    3. Messages and Transmission Channels.

    Information as a Quantity. Bounded Medium. Unbounded Medium. Effects of Bandwidth on a Transmission Channel. Bandwidth Requirements for Signals. Carrier Systems.

    4. Asynchronous Modems and Interfaces.

    Why Data Can't Be Transmitted Directly. Solving the Problem with Modems. Analog Modulation. V.21 Standard. Modem Features. Interface and Signaling Standards. The RS-232 and V.24 Interface. Other Interfaces. Asynchronous Modem Operations. Smart Modems. Viewing and Changing Modem Settings. Extended Command Set Variances. Fax Modems.

    5. Synchronous Modems, Digital Transmission, and Service Units.

    Synchronous Signaling and Standards. Typical Synchronous Components. Standard and Evolving Modems. High-Speed Modems. Access Control. Digital Transmission. The V.35 Interface.

    6. Multiplexing Techniques.

    Sharing a Channel. Statistical Time-Division Multiplexing. Low-Speed Voice/Data Multiplexers.

    7. Fiber-Optic and Satellite Communications.

    Introduction and Historical Perspective. Fundamentals of Fiber-Optic Systems. Fiber-Optic Subsystems and Components. Transmission Systems. Wavelength-Division Multiplexing. Satellite Transmission Systems.

    8. Protocols and Error Control.

    Protocols Versus Interfaces. Elements of a Protocol. Teletypewriter and XMODEM Protocols. Convolutional Coding-Cyclic Redundancy Checks. Half-Duplex Protocols. Full-Duplex Protocols.

    9. PC Communications Software.

    Communications Program Features. Dial-Up Networking. Using ProcommPlus for Windows.

    10. WAN Architectures and Packet Networks.

    The Open Systems Interconnect Reference Model. Protocol Layering. Packet Networks. Advantages of Packet Switching. X.25 Packet Systems. Value-Added Services. The X Series of Recommended Standards. Recent Developments. Networking Cost Comparison.

    11. Local Area Networks.

    Overview of LANs. LANs Versus Other Techniques. The Ideal LAN. LAN Standards. Ethernet (CSMA/CD). Other Ethernet Networks. Fast Ethernet. Gigabit Ethernet. 10 Gigabit Ethernet. Token-Passing LANs. Internetworking Devices.

    12. The Internet.

    Evolution of the Internet. Application Services. Internet Access Providers. IP Addressing. The Transmission Control Protocol. The User Datagram Protocol. The Internet Control Message Protocol. Serial Communications Support. Navigating the Growing Web. Evolving Internet Applications. Voice over IP. Virtual Private Networking.

    13. ISDN.

    The Road to ISDN. ISDN Architecture. ISDN Implementation Standards. Growth and Adaptation of ISDN. Pricing. Applications.

    14. Asynchronous Transfer Mode.

    Evolution. The Rationale for ATM and Its Underlying Technology. Architecture. Network Connections. Advantages of the Technology. Cell Routing. The ATM Protocol Reference Model. Service Definitions. LAN Emulation.

    15. Wireless Transmission.

    Mobile Wireless. Cellular Component Relationship. Internet Access. 3G Networks. Wireless LANs. Transmission Methods.

    16. Network Security.

    Authorization, Authentication, and Accounting. Computer Lockout. Data Encryption. Digital Certificates. Secure Sockets Layer and S-HTTP. Router-Based Security. Access Lists. Extended Access List. Network Protection Via a Firewall.

    Network Design Goals. Networking Devices. Interconnection of Networking Devices. Fault Isolation. Restoration of Service. Network Management Standards.

    Appendix A. Glossary.

    Appendix B. Bibliography.

    Appendix C. Answers to Quizzes.



    Who This Book Is For

    This book was written as a comprehensive guide to the evolution and modern development associated with the various facts of the field of data communications. As such, this book can be used as a textbook both by students and professionals. Each chapter includes a quiz to test your knowledge, and the answers to questions are contained at the back of this book.

    This Book's Approach to Data Communications

    The modern society we live in today is a communications-oriented society. Thus, the goal of this book is to assist readers in understanding how this society operates by examining the basic structure of the field of data communications. This book explains how different communications devices operate, describes the different types of transmission facilities used to transport information, and examines such emerging technologies as digital subscriber lines and cable modems that might revolutionize the manner by which we work. For readers who surf the Web with conventional modems, imagine being able to transmit and receive data at a speed several orders of magnitude beyond what we now do. The possibilities for new applications become almost endless. Soon, we will be able to visit museums and join virtual lectures on the style of different artists, and we'll be able to zoom in to see minute details that might previously have required a trip around the world. Soon, we will be able to talk and view our parents, business associates, or pen pals located hundreds or thousands of miles away as if they were in our living rooms or offices, and we will do so not only on our home computer but on our cell phone! So join me in examining the field of data communications as we explore its evolution and the technical aspects of equipment and transmission facilities that make the wonderful world of data communications a reality.



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