本书是著名计算机专业作家William Stallings的经典著作之一，内容涉及基本的数据通信原理、各种类型的计算机网络以及多种网络协议和应用。新增主题包括软件定义网络，无线传输技术复杂性分析，4G蜂窝网络，千兆位WiFi，DHCP，PIM，QoS结构框架和标准因特网邮件体系结构。此外，本书还包括参考文献和缩略语，并且每章都附有习题和建议，以便读者进一步阅读。

William Stallings博士著有17种著作，将更新版包括在内共计40本有关计算机安全、计算机网络以及计算机体系结构的书。曾12次获得文字和学术作者协会颁发的年度最佳计算机科学教材奖。其著作在大量的出版物中被引用参考，包括Proceedings of the IEEE和ACM Computing Review以及Cryptologia。在他30余年的职业生涯中，曾担任过技术撰稿人，技术管理者以及几个高科技公司的经理。曾在各种计算机平台和操作系统上设计并实现了基于TCP/IP的和基于OSI的协议族，这些计算机平台囊括了从微型计算机到大型计算机等各种类型。作为一名顾问，他曾为政府部门，计算机与软件经销商，以及设计、选择和使用组网软件和产品的大客户提供过指导。
William Stallings博士著有17种著作，将更新版包括在内共计40本有关计算机安全、计算机网络以及计算机体系结构的书。曾12次获得文字和学术作者协会颁发的年度最佳计算机科学教材奖。其著作在大量的出版物中被引用参考，包括Proceedings of the IEEE和ACM Computing Review以及Cryptologia。在他30余年的职业生涯中，曾担任过技术撰稿人，技术管理者以及几个高科技公司的经理。曾在各种计算机平台和操作系统上设计并实现了基于TCP/IP的和基于OSI的协议族，这些计算机平台囊括了从微型计算机到大型计算机等各种类型。作为一名顾问，他曾为政府部门，计算机与软件经销商，以及设计、选择和使用组网软件和产品的大客户提供过指导。

Chapter 0　Guide for Readers and Instructors 0.1　Outline of the Book 0.2　A Roadmap for Readers and Instructors 0.3　Internet and Web Resources 0.4　Standards UNIT ONE　FUNDAMENTALS PART ONE　OVERVIEW Chapter 1　Data Communications, Data Networks, and the Internet 1.1　Data Communications and Networking for Today＇s Enterprise 1.2　A Communications Model 39 1.3　Data Communications 42 1.4　Networks 45 1.5　The Internet 48 1.6　An Example Configuration 53 Chapter 2　Protocol Architecture, TCP/IP, and Internet-Based Applications 2.1　The Need for a Protocol Architecture 2.2　A Simple Protocol Architecture 2.3　The TCP/IP Protocol Architecture 2.4　Standardization within a Protocol Architecture 2.5　Traditional Internet-Based Applications 2.6　Multimedia 2.7　Sockets Programming 2.8　Recommended Reading and Animation 2.9　Key Terms, Review Questions, and Problems 2.10　Sockets Programming Assignments Appendix 2A　The Trivial File Transfer Protocol PART TWO　DATA COMMUNICATIONS Chapter 3　Data Transmission 3.1　 Concepts and Terminology 3.2　Analog and Digital Data Transmission 3.3　Transmission Impairments 3.4　Channel Capacity 3.5　Recommended Reading 3.6　Key Terms, Review Questions, and Problems Appendix 3A　Decibels and Signal Strength Chapter 4　Transmission Media 4.1　Guided Transmission Media 4.2　Wireless Transmission 4.3　Wireless Propagation 159 4.4　Line-of-Sight Transmission 4.5　Recommended　Reading 4.6　Key Terms, Review Questions, and Problems Chapter 5 Signal Encoding Techniques 5.1　Digital Data, Digital Signals 5.2　Digital Data, Analog Signals 5.3　Analog Data, Digital Signals 5.4　Recommended Reading and Animations 5.5　Key Terms, Review Questions, and Problems Chapter 6 Error Detection and Correction 6.1　Types of Errors 6.2　Error Detection 6.3　Parity Check 6.4　The Internet Checksum 6.5　Cyclic Redundancy Check (CRC) 6.6　Forward Error Correction 6.7　Recommended Reading and Animations 6.8　Key Terms, Review Questions, and Problems Chapter 7　Data Link Control Protocols 7.1　Flow Control 7.2　Error Control 7.3　High-Level Data Link Control (HDLC) 7.4　Recommended Reading and Animations 7.5　Key Terms, Review Questions, and Problems Chapter 8　Multiplexing 8.1　Frequency-Division Multiplexing 8.2　Synchronous Time-Division Multiplexing 8.3　Cable Modem 8.4　Asymmetric Digital Subscriber Line 8.5　xDSL 8.6 Multiple Channel Access 8.7　Recommended Reading and Animations 8.8　Key Terms, Review Questions, and Problems PART THREE WIDE AREA NETWORKS Chapter 9 WAN Technology and Protocols 9.1　Switched Communications Networks 9.2　Circuit-Switching Networks 9.3　Circuit-Switching Concepts 9.4　Softswitch Architecture 9.5　Packet-Switching Principles 9.6　Asynchronous Transfer Mode 9.7　Recommended Reading 9.8　Key Terms, Review Questions, and Problems Chapter 10　Cellular Wireless Networks 10.1　Principles of Cellular Networks 10.2　Cellular Network Generations 10.3　LTE-Advanced 10.4　Recommended Reading 10.5　Key Terms, Review Questions, and Problems PART FOUR LOCAL AREA NETWORKS Chapter 11　Local Area Network Overview 11.1　Bus and Star Topologies 11.2　LAN Protocol Architecture 11.3　Bridges 11.4　Hubs and Switches 11.5　Virtual LANs 11.6　Recommended Reading and Animations 11.7　Key Terms, Review Questions, and Problems Chapter 12　Ethernet 12.1　Traditional Ethernet 12.2　High-Speed Ethernet 12.3　IEEE 802.1Q VLAN Standard 12.4　Recommended Reading and Animations 12.5　Key Terms, Review Questions, and Problems Appendix 12A　Digital Signal Encoding for LANs Appendix12B　Scrambling Chapter 13　Wireless LANs 13.1　Overview 13.2　IEEE 802.11 Architecture and Services 13.3　IEEE 802.11 Medium Access Control 13.4　IEEE 802.11 Physical Layer 13.5　Gigabit Wi-Fi 13.6　IEEE 802.11 Security Considerations 13.7　Recommended Reading 13.8　Key Terms, Review Questions, and Problems PART FIVE　INTERNET AND TRANSPORT PROTOCOLS Chapter 14　The Internet Protocol 14.1　Principles of Internetworking 14.2　Internet Protocol Operation 14.3　Internet Protocol 14.4　IPv6 14.5　Virtual Private Networks and IP Security 14.6　Recommended Reading and Animations 14.7　Key Terms, Review Questions, and Problems Chapter 15　Transport Protocols 15.1　Connection-Oriented Transport Protocol Mechanisms 15.2　TCP 15.3　UDP 15.4　Recommended Reading and Animations 15.5　Key Terms, Review Questions, and Problems UNIT TWO　ADVANCED TOPICS IN DATA COMMUNICATIONS AND NETWORKING PART SIX　DATA COMMUNICATIONS AND WIRELESS NETWORKS Chapter 16　Advanced Data Communications Topics 16.1　Analog Data, Analog Signals 16.2　Forward Error-Correcting Codes 16.3　ARQ Performance Issues 16.4　Recommended Reading and Animations 16.5　Key Terms, Review Questions, and Problems Chapter 17　Wireless Transmission Techniques 17.1　MIMO Antennas 17.2　OFDM, OFDMA, and SC-FDMA 17.3　Spread Spectrum 17.4　Direct Sequence Spread Spectrum 17.5　Code Division Multiple Access 17.6　Recommended Reading 17.7　Key Terms, Review Questions, and Problems Chapter 18　Wireless Networks 18.1　Fixed Broadband Wireless Access 18.2　WiMAX/IEEE 802.16 18.3　Bluetooth Overview 18.4　Bluetooth Radio Specification 18.5　Bluetooth Baseband Specification 18.6　Bluetooth Logical Link Control and Adaptation Protocol 18.7　Recommended Reading 18.8　Key Terms, Review Questions, and Problems PART SEVEN　INTERNETWORKING Chapter 19　Routing 19.1　Routing in Packet-Switching Networks 19.2　Examples: Routing in ARPANET 19.3　Internet Routing Protocols 19.4　Least-Cost Algorithms 19.5　Recommended Reading and Animations 19.6　Key Terms, Review Questions, and Problems Chapter 20　Congestion Control 20.1　Effects of Congestion 20.2　Congestion Control 20.3　Traffic Management 20.4　Congestion Control in Packet-Switching Networks 20.5　TCP Congestion Control 20.6　Datagram Congestion Control Protocol 20.7　Recommended Reading and Animations 20.8　Key Terms, Review Questions, and Problems Chapter 21　Internetwork Operation 21.1　Multicasting 21.2　Software-Defined Networks 21.3　OpenFlow 21.4　Mobile IP 21.5　Dynamic Host Configuration Protocol 21.6　Recommended Reading and Animations 21.7　Key Terms, Review Questions, and Problems Chapter 22　Internetwork Quality of Service 22.1　QOS Architectural Framework 22.2　Integrated Services Architecture 22.3　Resource Reservation Protocol 22.4　Differentiated Services 22.5　Service Level Agreements 22.6　IP Performance Metrics 22.7　Recommended Reading and Web Sites 22.8　Key Terms, Review Questions, and Problems Chapter 23　Multiprotocol Label Switching 23.1　The Role of MPLS 23.2　Background 23.3　MPLS Operation 23.4　Labels 23.5　FECs, LSPs, and Labels 23.6　Label Distribution 23.7　Traffic Engineering 23.8　Virtual Private Networks 23.9　Recommended Reading 23.10　Key Terms, Review Questions, and Problems PART EIGHT　INTERNET APPLICATIONS Chapter 24　Electronic Mail, DNS, and HTTP 24.1　Electronic Mail-SMTP and MIME 24.2　Internet Directory Service: DNS 24.3　Web Access and HTTP 24.4　Recommended Reading and Animations 24.5　Key Terms, Review Questions, and Problems Chapter 25　Internet Multimedia Support 25.1　Real-Time Traffic 25.2　Voice Over IP 25.3　Session Initiation Protocol 25.4　Real-Time Transport Protocol (RTP) 25.5　Recommended Reading 25.6　Key Terms, Review Questions, and Problems APPENDICES Appendix A　Fourier Analysis A.1　Fourier Series Representation of Periodic Signals A.2　Fourier Transform Representation of Aperiodic Signals A.3　Recommended Reading Appendix B　Projects and Other Student Exercises for Teaching Data and Computer Communications B.1　Animations and Animation Assignments B.2　Practical Exercises B.3　Sockets Projects B.4　Wireshark Projects B.5　Simulation and Modeling Projects B.6　Performance Modeling B.7 Research Projects B.8　Reading/Report Assignments B.9　Writing Assignments B.10　Discussion Topics References Index 887 ONLINE CHAPTERS AND APPENDICES1 PART NINE　NETWORK SECURIETY Chapter 26　Computer and Network Security Threats 26.1　Computer Security Concepts 26.2　Threats, Attacks, and Assets 26.3　Intruders 26.4　Malicious Software Overview 26.5　Viruses, Worms, and Bots 26.6　Recommended Reading 26.7　Key Terms, Review Questions, and Problems Chapter 27　Computer and Network Security Techniques 27.1　Virtual Private Networks and IPsec 27.2　SSL and TLS 27.3　Wi-Fi Protected Access 27.4　Intrusion Detection 27.5　Firewalls 27.6　Malware Defense 27.7　Recommended Reading 27.8　Key Terms, Review Questions, and Problems Appendix C　Standards Organizations Appendix D　Asynchronous and Synchronous Transmission Appendix E　The OSI Model Appendix F　The International Reference Alphabet Appendix G　Proof of the Sampling Theorem Appendix H　Ones Complement Representation and Addition Appendix I　Statistical TDM Appendix J　The Spanning Tree Algorithm Appendix K　LAN Performance Issues Appendix L　Matrix Multiplication and Determinants Appendix M　Queuing Effects Appendix N　Orthogonality, Correlation, and Autocorrelation Appendix O TCP/IP Example Appendix P　Queue Management and Queueing Discipline Appendix Q　Cryptographic Algorithms Appendix R　Uniform Resource Locators (URLs) and Uniform Resource Identifiers (URIs) Appendix S　Augmented Backus-Naur Form Appendix T　Derivations of Equations and Examples Glossary