数据与计算机通信 英文版PDF电子书下载

PART ONE OVERVIEW 1

Chapter 1 Data Communications,Data Networking,and the Internet 1

1.1 Data Communications and Networking for Today's Enterprise 3

1.2 A Communications Model 7

1.3 Data Communications 10

1.4 Networks 13

1.5 The Internet 16

1.6 An Example Configuration 20

Chapter 2 Protocol Architecture,TCP/IP,and Internet-Based Applications 23

2.1 The Need for a Protocol Architecture 24

2.2 The TCP/IP Protocol Architecture 25

2.3 The OSI Model 33

2.4 Standardization within a Protocol Architecture 35

2.5 Traditional Internet-Based Applications 39

2.6 Multimedia 39

2.7 Recommended Reading 44

2.8 Problems 45

Appendix 2A The Trivial File Transfer Protocol 47

PART TWO DATA COMMUNICATIONS 52

Chapter 3 Data Transmission 52

3.1 Concepts and Terminology 54

3.2 Analog and Digital Data Transmission 65

3.3 Transmission Impairments 73

3.4 Channel Capacity 78

3.5 Recommended Reading 83

3.6 Problems 83

Appendix 3A Decibels and Signal Strength 86

Chapter 4 Transmission Media 89

4.1 Guided Transmission Media 91

4.2 Wireless Ttansmission 104

4.3 Wireless Propagation 112

4.4 Line-of-Sight Transmission 116

4.5 Recommended Reading 120

4.6 Problems 121

Chapter 5 Signal Encoding Techniques 124

5.1 Digital Data,Digital Signals 127

5.2 Digital Data,Analog Signals 137

5.3 Analog Data,Digital Signals 148

5.4 Analog Data,Analog Signals 154

5.5 Recommended Reading 161

5.6 Problems 161

Chapter 6 Digital Data Communication Techniques 165

6.1 Asynchronous and Synchronous Transmission 167

6.2 Types of Errors 171

6.3 Error Detection 171

6.4 Error Correction 181

6.5 Line Configurations 186

6.6 Recommended Reading 188

6.7 Problems 189

Chapter 7 Data Link Control Protocols 192

7.1 Flow Control 194

7.2 Error Control 201

7.3 High-Level Data Link Control(HDLC) 207

7.4 Recommended Reading 213

7.5 Problems 214

Appendix 7A Performance Issues 216

Chapter 8 Multiplexing 223

8.1 Frequency-Division Multiplexing 226

8.2 Synchronous Time-Division Multiplexing 232

8.3 Statistical Time-Division Multiplexing 242

8.4 Asymmetric Digital Subscriber Line 249

8.5 xDSL 252

8.6 Recommended Reading 253

8.7 Problems 254

Chapter 9 Spread Spectrum 257

9.1 The Concept of Spread Spectrum 259

9.2 Frequency Hopping Spread Spectrum 260

9.3 Direct Sequence Spread Spectrum 265

9.4 Code-Division Multiple Access 270

9.5 Recommended Reading 273

9.6 Problems 273

PART THREE WIDE AR EA NETWORKS 277

Chapter 10 Circuit Switching and Packet Switching 277

10.1 Switched Communications Networks 279

10.2 Circuit Switching Networks 281

10.3 Circuit Switching Concepts 284

10.4 Softswitch Architecture 287

10.5 Packet-Switching Principles 289

10.6 X.25 297

10.7 Frame Relay 299

10.8 Recommended Reading 304

10.9 Problems 304

Chapter 11 Asynchronous Transfer Mode 307

11.1 Protocol Architecture 308

11.2 ATM Logical Connections 310

11.3 ATM Cells 314

11.4 Transmission of ATM Cells 319

11.5 ATM Service Categories 324

11.6 Recommended Reading 327

11.7 Problems 328

Chapter 12 Routing in Switched Networks 330

12.1 Routing in Packet-Switching Networks 331

12.2 Examples:Routing in ARPANET 341

12.3 Least-Cost Algorithms 346

12.4 Recommended Reading 351

12.5 Problems 352

Chapter 13 Congestion Control in Data Networks 355

13.1 Effects of Congestion 357

13.2 Congestion Control 361

13.3 Traffic Management 364

13.4 Congestion Control in Packet-Switching Networks 365

13.5 Frame Relay Congestion Control 366

13.6 ATM Traffic Management 372

13.7 ATM-GFR Traffic Management 384

13.8 Recommended Reading 387

13.9 Problems 388

Chapter 14 Cellular Wireless Networks 391

14.1 Principles of Cellular Networks 393

14.2 First Generation Analog 405

14.3 Second Generation CDMA 407

14.4 Third Generation Systems 415

14.5 Recommended Reading 418

14.6 Problems 419

PART FOUR LOCAL AREA NETWORKS 421

Chapter 15 Local Area Network Overview 421

15.1 Background 423

15.2 Topologies and Transmission Media 426

15.3 LAN Protocol Architecture 432

15.4 Bridges 440

15.5 Layer 2 and Layer 3 Switches 448

15.6 Recommended Reading 453

15.7 Problems 454

Chapter 16 High-Speed LANs 456

16.1 The Emergence of High-Speed LANs 457

16.2 Ethernet 459

16.3 Fibre Channel 474

16.4 Recommended Reading 478

16.5 Problems 480

Appendix 16A Digital Signal Encoding for LANs 481

Appendix 16B Performance Issues 487

Appendix 16C Scrambling 492

Chapter 17 Wireless LANs 495

17.1 Overview 496

17.2 Wireless LAN Technology 501

17.3 IEEE 802.11 Architecture and Services 504

17.4 IEEE 802.11 Medium Access Control 508

17.5 IEEE 802.11 Physical Layer 516

17.6 IEEE 802.11 Security Considerations 522

17.7 Recommended Reading 523

17.8 Problems 524

PART FIVE INTERNET AND TRANSPORT PROTOCOLS 526

Chapter 18 Internetwork Protocols 526

18.1 Basic Protocol Functions 528

18.2 Principles of Internetworking 536

18.3 Internet Protocol Operation 539

18.4 Internet Protocol 546

18.5 IPv6 556

18.6 Virtual Private Networks and IP Security 566

18.7 Recommended Reading 569

18.8 Problems 570

Chapter 19 Internetwork Operation 573

19.1 Multicasting 575

19.2 Routing Protocols 584

19.3 Integrated Services Architecture 595

19.4 Differentiated Services 606

19.5 Service Level Agreements 615

19.6 IP Performance Metrics 616

19.7 Recommended Reading 619

19.8 Problems 621

Chapter 20 Transport Protocols 624

20.1 Connection-Oriented Transport Protocol Mechanisms 626

20.2 TCP 643

20.3 TCP Congestion Control 652

20.4 UDP 662

20.5 Recommended Reading 664

20.6 Problems 664

PART SIX INTERNET APPLICATIONS 667

Chapter 21 Network Security 667

21.1 Security Requirements and Attacks 669

21.2 Confidentiality with Conventional Encryption 671

21.3 Message Authentication and Hash Functions 679

21.4 Public-Key Encryption and Digital Signatures 686

21.5 Secure Socket Layer and Transport Layer Security 693

21.6 IPv4 and IPv6 Security 698

21.7 Wi-Fi Protected Access 703

21.8 Recommended Reading 705

21.9 Problems 706

Chapter 22 Internet Applications—Electronic Mail and Network Management 708

22.1 Electronic Mail:SMTP and MIME 710

22.2 Network Management:SNMP 725

22.3 Recommended Reading 735

22.4 Problems 736

Chapter 23 Internet Applications—Internet Directory Service and World Wide Web 738

23.1 Internet Directory Service:DNS 739

23.2 Web Access:HTTP 749

23.3 Recommended Reading 760

23.4 Problems 761

Chapter 24 Internet Applications—Multimedia 763

24.1 Audio and Video Compression 764

24.2 Real-Time Traffic 772

24.3 Voice Over IP and Multimedia Support—SIP 775

24.4 Real-Time Transport Protocol(RTP) 784

24.5 Recommended Reading 795

24.6 Problems 796

APPENDICES 797

Appendix Projects and Other Student Exercises for Teaching Data and Computer Communications 797

A.1 Practical Exercises 798

A.2 Sockets Projects 799

A.3 Ethereal Projects 799

A.4 Simulation and Modeling Projects 800

A.5 Performance Modeling 800

A.6 Research Projects 801

A.7 Reading/Report Assignments 801

A.8 Writing Assignments 801

A.9 Discussion Topics 802

References 803

Index 814