数据通信与网络教程：英文版

　　The first edition of this book first appeared four years ago; much in the fields of data communications and computer networks has changed since then. Probably most visible is the emergence of the World Wide Web （WWW） and the many applications it supports. Perhaps less visible is the impact the Web has had on underlying network protocols to support these applications and the increased importance of issues involving privacy and security. In just a few years the scope of network users has changed forever. Not long ago most network users were primarily professionals，who might use email occasionally to talk to colleagues or request some vital information. Now network users number in the tens of millions and their uses range from professional needs to purely recreational activities. Although much of this book's content has changed， its purpose is still fundamentally tbe same. It is designed for junior-level students in a computer science program who have a minimum of two semesters of programming and a knowledge of precalculus and discrete mathematics. It covers standard topics found in a typical introductory course in data communications and computer networks， such as transmission media， analog and digital signals， data transmissions， compression and encryption methods， network topologies， data security， Ethernets and token ring protocols， wide area network protocols， and World Wide Web applications.

暂缺《数据通信与网络教程：英文版》作者简介

CHAPTER 1 INIRODUCTION TO COMMUNICATIONS, STANOARDS,                  
 AND PTOTOCOLS                  
                   
 1 .1 WHY STUDY CoMMUNICATIONS?                  
 A Brief History I · Applications 3 · Issues 6                  
                   
 1 .2 COMPUTER NETWORKS                   
 Common Bus Topology 9 · Star Topology IO ·                  
 Ring Topology  11· Fully Connected Topology l2 · Combined Topologies l3                  
                   
 1.3  STANDARDS AND STANDARDS ORGANIZATIONS                  
 The Need for STandards 14 v Agencies l5                  
                   
 1.4  OPEN SYSTEMS AND THE OSI MODEL                  
 Overview of the Model 20 · Physical Layer 23·Data Link Layer 28 · Network Layer 30· Transport                  
 Layer 32 · Session Layer 38 · Presentation Layer 42 · Application Layer 45 · Summary 46                  
                   
 1.5 THE FUTURE OF DATA CoMMUNICTIONS                  
 REVIEW QUESTIONS 51 ·EXERCISE5 53 · REFETENCES 54(HAPIER 2 IRANSMISSON FUNDAMENTALS                  
                   
 2.1 COMMUNICATIONS MEDIA                  
 Conductive Mebal 59 · Optical Fiber 62 · Wireless Communications 66 · Summary · 8 1                  
                   
 2.2  COMMUNICATloN SERVICES AND DEVICES                  
 Telephone System 83 · Integrated Services Digital Network 87 · Cellular Phones 88 · Fax Machines 90                  
                   
 2.3  Cooes                  
 ASCII Code 93 · EBCDIC Code 94 · Baudot, Morse, and BCD Codes 97                  
                   
 2.4  ANALOG AND DIGITAL SIGNALS                  
 Digital Encoding Schemes l02 · Analog Signals 105 Bit Rate 110                  
                   
 2.5  MODULATION AND DEMODULATION                  
 Digital-to-Analog Conversion 116· Analog-to-Digital Conversion 121                  
                   
 2.6  MODEMS AND MODEM  STANDARDS                  
 Signal Constellation 126· Intelligent (Hayes Compatible)Modems 130 · Cable Modems 131· Null Modems 135                  
                   
 2.7  SUMMARY                  
 REVIEW QUESTIONS 137· EXERCISES 139· REFEREMCES 143                  
                   
 CHAPTER 3 OATA COMMUNICATION                  
                   
 3.1 TRANSSION MODES                  
 Serial and Parallel Transmission 146 · Asynchronous and Synchronous Transmission 147 · Simplex, Half-Duplex, and Full-Duplex Commanications 150                  
                   
 3.2 INTERFACE STANDARDS                  
 RS-232 Interfce 152 · RS-232 Subsets 155· Null Modems  156 · RS-449 Interface 157 · X.21 Interface 159                  
                   
 3.3 MuLTIPLEXING                  
 Frequency-Division Multiplexing  163· Time-Division Multiplexing  165 · Statistical Multiplexers  167 T-I CaRRier 169                  
                   
 3.4 CONTENTION PRoTocoLs                  
 Aloha Protocols  174 · Carrier Sense Multiple Access  177 · Collision Detection 180 · Token                  
 Passing  183 · Summary of prtocols  187                  
                   
 3.5 DATA COMPRESSION                  
 Huffman Code 189 · Run-Length Encoding  192 · Relative Encoding  194 · Lempel-Ziv Encoding  195 · Image Compression 201 ·JPEG 203 · MPEG 211 · Summary of Compression Techniques 216                  
                   
 3.6 SUMMARY                  
 REVIEW QUESTIONS 218 · EXERCISES 220  · REFERENCES 224                  
                   
 CHAPTER 4 DATA SECURITY AND INIEGRITY                  
                   
 4.1 INTRODUCTION                  
                   
 4.2 PARITY CHECKING                  
 Parity Checking Analysis 228 · Double-Bit Error Detection 229 · Burst Error Detection 229                  
                   
 4.3 CVCLIC REDUNDANEY CHECKS                  
 Polynomial Division 232 · How CRC Works 233 Analysis of CRC 235 · CRC Implementation Using Circular Shifts 239                  
                   
 4.4 HAMMING CODES                  
 Single-Bit Error Correction 241 · Multiple-Bit Error Correction 244 · Comparison of Error Detection and Error Correcrion 244 ·                  
                   
 4.5 ENCRYPTION AND DECRYPTION                  
 Caesar Cipher 247 · Polyalphabetic Cipher 248 · Transposition Cipher 250 · Bit-Level Ciphering 251· Data Encryption Standard 252 · Clipper Chip 256 · Key DisRibution and Protection 260 · Merkle's Puzles 260 · Shamir's Method 261                  
                   
 4.6 PUBLIC  KEV ENCRYPTION                  
 RSA Algorithm 264 · Digital Signatures 266 · Authentication Using Hash-Based Schemes 268 · Summary of Encryption Methods 272 · Encryption Potpouni 272                  
                   
 4.7 VIRUSES, WORMS, AND HACKERS                  
 Infecting Files 275 · Memory-Resident Viruses 276 Virus Evolution 277 · Virus Sources 281 · The Internet Worm 281 · Computer Hackers 283                  
                   
 4.8 SuMMARY                  
 RECIEW QUESTIONS 286 · EXERCISES 288 · REFERENCES 291                  
                   
 CHAPTER 5 PROTOCOL CONCEPTS                  
                   
 5.1 INTRODUCTION                  
                   
 5.2 BASIC FLOW CONTROL                  
 Signaling 295 · Frame-Oriented ConUol 297 Protocol Efficiency 301                  
                   
 5.3 SLIDING WINDOW PRoTocoLs                  
 Frame Format 306 · Go-back-n Protocol 307 Selective Repeat Protocol 314 · Sliding Window Protocol Efficiency 322 · Summary of Protocols 324                  
                   
 5.4 PROTOCOL CORRECTNESS                  
 Finite State Machines 325 · Petri Nets 331                  
                   
 5.5 DATA LINK CONTROL PROTOCOLS                  
 High-Level Data Link Control (HDLC) 336 · Other Bit-Oriented hotocols 344 · Binary Synchronous Communications Protocol 345 · Summary: Data Link Protocols 349                  
                   
 5.6 CASE STUDY: KERMIT                  
 Frame Format 351 · Protocol 352 ·Commands 354                  
                   
 5.7 SUMMARY                  
 REVIEW QUESTIONS 357 · EXERCISES 359 · REFERENCES 363                  
                   
 CHAPTER 6 LOCAL AREA NEIWORKING                  
                   
 6.1 NeTWORK TOPOLOGIES                  
                   
 6.2 ETHERNET: IEEE STANDARD 802.3                  
 Relation to OSI 368 · Ethernet Components 368 · Cabe Specifications 371 · Connecting Segments 373 · Frame Format 374 · Efficiency 375                  
                   
 6.3 TOKEN RING: IEEE STANDARD 802.5                  
 Token and Frame Formats 381 ·  Resercing and Claiming Tokens 383 · Ring Maintenance 389 · Efficiency 39l · Other Ring Networks 39                  
                   
 6.4 TOKEN Bus: IEEE STANDARD 802.4                  
 Token Bus Operations 399 · Lost Tokens 402 Ring Initialization 403 · Prioritizing Frames 404\                  
                   
 6.5 INTERCONNECTING LANs                  
 Layer l Connections 409 · Layer 2 Connections 410 Bridging Different TYpes of LANs 411 · Bridge Routing 413 Summary 426                  
                   
 6.6 CASE STUDY: NOVELL NETWARE                  
 NetWare Configuration 427 · Running Novell NetWare 429 · Security and Integrity 431 · Selected Novell Commands 434 · Login Scripts 436                  
                   
 6.7 SUMMARY                  
 REVIEW QUESTIONS 440 · EXERCISES 443 · REFERENCES 446                  
                   
 CHAPIER 7 WIDE AREA NETWORKINe                  
                   
 7.1 INTROUCTION                  
                   
 7.2 NETWORK ROUTING                  
 Routing Tables 452 · Types of Routing 453 Dijkstra's Algorithm 456 · Bellman-Ford Algorithm 459                  
 Link State Routing 466 · Hierarchical Routing 467 Routing Information Protocol 470 · Open Shortest Path First 471 · Border Gateway Protocol 472 · Summary of Routing Techniques 473 · Congestion and Deadlock 473                  
                   
 7.3 PUBLIC  DATA NETWORKS: THe X SERIES PROTOCOLS                  
 Packet-Switched Network Modes 479 · X.25 Public Data Network Interface Standard 481 · Triple-X Standard  for Non-X.25 Devices 486                  
                   
 7.4 INTERNET PROTOCLS                  
 Overview of TCP/IP 491 · Internet Addressing 493 · Domain Name System 495 ·  IP Packets 497 · Fragmentation 500 · IP Routing 501 · Internet Control Message Protocol 504 · IPv6 506                  
                   
 7.5 TRANSPORT PROTOCOLS                  
 Transmission Control Protocol 518 · User Datagram Protocol 529 · OSI Transport Protocols 529                  
                   
 7.6 SOCKET PRIGRAMMING                  
 Sockets 532 · ClienT/Server Model 532 · Socket Data Structures 533 · Socket Commands 535 · Client/Server Example 535                  
                   
 7.7 SUMMARY                  
 REVIEW QUESTIONS 551 · EXERCISES 553 · REFETENCES 557                  
                   
 CHAPTER 8 ADDITIONAL NETWORK PROTOCOLS                  
                   
 8.1 INTERNET APPLlCATlONS                  
 Virtual Terminal 559 · Telnet 560 · File Transfers 564 Simple Mail Transfer Protocol 571 ·  Simple Network Management Protocol 573                  
                   
 8.2 WORLD WIDE WEN                  
 Web Page Access 577 · Hypertext Markup Language 579 · HTML Forms 582 · JavaScript and Client-side Programming 587 · Common Gateway Interface and Server-side Programming 592                  
                   
 8.3 ELECTRONIC MAIL: X.400 AND X.500 STANDARDS                  
 X.400 Mail Standards 598 · X.500 Directory Service 606 · Summary 610                  
                   
 8.4 INTEGRATED SERVICES DIGITAL NETWORK                  
 ISDN Services 612 · ISDN Architecture 613 Protocols 6l5 · Broadband ISDN 624                  
                   
 8.5 ASYNCHRONOUS TRANSFER MODE                  
 Benefits of Small Fixed-Size Cells 626 · Overview of ATM Network 628 · Switching 629 · Reference Model 631 · Cell Definition 633 · Virtual Circuits and Paths 636 · Connection Management 637 · Adaptation Layers 639                  
                   
 8.6 SYSTEMS NETWORK ARCHITECTURE                  
 Lower Layers Physical Link Control  647 · Path Control 648 · Trznsmission Control 654 · Data Flow Control 657 · Higher Layers 659 REVIEW QUESTIONS 661 · EXERCISES 663 · REFERENCES 665                  
 GLOSSARY                  
 ACRONYMS                  
 INDEX