Two-time winner of the best Computer Science and Engineering textbook of the year award from the Textbook and Academic Authors Association
    For a one/two-semester courses in Computer Networks, Data Communications, and Communications Networks in CS, CIS, and Electrical Engineering departments.
    With a focus on the most current technology and a convenient modular format, this best-selling text offers a clear and comprehensive survey of the entire data and computer communications field. Emphasizing both the fundamental principles as well as the critical role of performance in driving protocol and network design, it explores in detail all the critical technical areas in data communications, wide-area networking, local area networking, and protocol design.

WHAT'S NEW IN THE 9TH EDITION

    This ninth edition is seeing the light of day less than four years after the publication of the eighth edition. During that time, the pace of change in this field continues unabated. In this new edition, Stallings tries to capture these changes while maintaining a broad and comprehensive coverage of the entire field. To begin the process of revision, the eighth edition of this book was extensively reviewed by a number of professors who teach the subject. The result is that, in many places, the narrative has been clarified and tightened, and illustrations have been improved.

    Beyond these refinements to improve pedagogy and user friendliness, there have been major substantive changes throughout the book. Highlights include:

- Animations: Animation provides a powerful tool for understanding the complex mechanisms of network protocols. The ninth
   edition incorporates a number separate animations covering such protocols as HyperText Transfer Protocol (HTTP), Simple Mail   
   Transfer Protocol (SMTP), and Transmission Control Protocol (TCP). The text clearly indicates where the animations should be
   used.
- Examples: The number of examples incorporated in the book has been significantly expanded.
- Twisted pair transmission standards: This new edition covers the 2009 ANSI/TIA 568-C standards and the recent ISO/IEC 11801
   twisted-pair transmissions, which are important for gigabit-range Ethernet and other high-speed twisted pair applications.
- Expanded coverage of broadband Internet access: The sections on cable modem and DSL broadband access have been expanded.
- New coverage of fourth generation (4G) mobile wireless networks: Includes the key   4G technology of orthogonal frequency   
   division multiple access (OFDMA).
- New coverage of virtual LANs: VLAN technology is covered, as well as the IEEE 802.1Q standard.
- Updated coverage of High-Speed Ethernet: The new 100-Gbps standard is covered, including the multilane distribution (MLD)
   transmission technique, plus expanded coverage of 64B/66B encoding.
- Updated coverage of WiFi/IEEE 802.11 wireless LANs: IEEE 802.11 and the related WiFi specifications have continued to evolve.
   New coverage includes 802.11n.
- Mobile IP: New to this edition is coverage of Mobile IP, which standardizes techniques for IP addressing and routing for mobile   
   end systems.
- MPLS: New to this edition is full chapter devoted to Multiprotocol Label Switching, which is becoming increasingly important on
   the Internet and other IP-based networks, as well as in telecommunications networks.
- Expanded coverage of security: The coverage of security, in Part Six, has been completely rewritten and expanded to two   
   chapters. It is more detailed, covering a number of new topics.

    In addition, throughout the book, virtually every topic has been updated to reflect the developments in standards and technology that have occurred since the publication of the eighth edition.

- Part One Overview
- Part Two Data Communications
- Part Three Wide Area Networks
- Part Four Local Area Networks
- Part Five Internet and Transport Protocols