1IntroductiontoDataandNetworkCommunications 1
1.1Introduction 1
1.2DataCommunicationSystem 6
1.3DataCommunicationLinks 10
1.4CharacterCodes 12
1.5DigitalDataRates 16
1.6SerialDataFormats 17
1.7EncodedDataFormats 20
Summary 24
Questions 25
DesignProblems 26
AnswerstoReviewQuestions 27
2TheTelephoneSystem 29
2.1Introduction 29
2.2TheTelephoneSystem 30
2.3SpecificationsandParameters 38
2.4LineImpairments 52
Summary 56
Questions 57
DesignProblems 58
AnswerstoReviewQuestions 59
3ErrorDetectionandCorrection 61
3.1Introduction 61
3.2AsynchronousDataMethods 62
3.3SynchronousDataErrorMethods 72
3.4Error-TestingEquipment 83
Summary 85
Questions 86
AnswerstoReviewQuestions 87
DesignProblems 87
4OpenSystemsNetworkModels 89
4.1Introduction 89
4.2DataTopologies 90
4.3DataSwitching 101
4.4TypesofNetworks 105
4.5TheOpenSystemsInteconnection(OSI)Architecture 108
4.6SystemsNetworkArchitecture(SNA) 114
4.7SNAOperatingSessions 121
Summary 122
Questions 123
DesignProblems 125
AnswerstoReviewQuestions 125
5OSIPhysicalLayerComponents 127
5.1Introduction 127
5.2UnitsofaCommunicationLink 128
5.3RS232CInterface 137
5.4RS449InterfaceStandard 145
5.5RS422andRS423InterfaceStandards 147
5.6FSKModems 150
5.7AdditionalTypesofModems 153
5.8.34andV.90Modems 170
Summary 171
Questions 173
ResearchAssignments 175
AnswerstoReviewQuestions 175
6HigherCapacityData 179
Communications 179
6.1Introduction 179
6.2MultiplexingMethods 181
6.3SamplingTheorem 190
6.4Quantization 197
6.5PulseCodeModulation 198
6.6DeltaModulation 202
6.7DigitalTCarriers 206
6.8Companding 213
6.9CODECs 217
Summary 221
Questions 221
DesignProblems 223
AnswerstoReviewQuestions 224
7Data-LinkLayerProtocols 227
7.1Introduction 227
7.2Data-LinkSections 228
7.3Character-OrientedProtocols 230
7.4Bit-OrientedProtocols 238
7.5ProtocolAnalyzers 249
Summary 251
Questions 252
AnswerstoReviewQuestions 254
8NetworkArchitectureandProtocols 257
8.1Introduction 257
8.2NetworksbySize 259
8.3IEEE802.3andEthernet 261
8.4IEEE802.4TokenBus 274
8.5IEEE802.5TokenRing 279
8.6NetworkInterfaceCards 283
8.7InterconnectingLANs 285
8.8IEEE802.6MetropolitanAreaNetwork(MAN) 291
8.9X.25PacketSwitchProtocol 293
Summary 296
Questions 296
ResearchAssignments 298
AnswerstoReviewQuestions 299
9IntegratedServicesandRoutingProtocols 301
9.1Introduction 301
9.2IntegratingServices 302
9.3BroadbandISDN 311
9.4IEEE802.9:IntegratedVoiceandDataServices 314
9.5DigitalSubscriberLine(DSL) 315
9.6PrivateBranchExchange 318
9.7AsynchronousTransferMode(ATM) 324
9.8FrameRelay 337
Summary 339
Questions 340
ResearchAssignments 343
AnswerstoReviewQuestions 343
10TheInternetandTCP/IP 347
10.1Introduction 347
10.2InternetHistory 348
10.3UsesfortheInternet 353
10.4AccessingtheInternet 358
10.5InternetAddresses 361
10.6SecurityontheInternet 365
10.7Authentication 367
10.8Firewalls 371
10.9IntranetsandExtranets 374
10.10TCP/IP,theTechnologybehindtheInternet 375
Questions 381
Summary 381
ResearchAssignments 384
AnswerstoReviewQuestions 384
11FiberOpticCommunications 387
11.1Introduction 387
11.2BasicConceptsofLightPropagation 389
11.3FiberCables 394
11.4LightSources 400
11.5OpticalDetectors 402
11.6Fiber-CableLosses 406
11.7WaveDivisionMultiplexing 409
11.8FiberDistributedDataInterface 411
11.9FDDI-II:IsochronousTraffic 418
11.10TheFibreChannel 419
11.11SONET 421
Summary 423
Questions 424
ResearchAssignments 427
AnswerstoReviewQuestions 427
12.1Introduction 431
12WirelessCommunicationSystems 431
12.2MicrowaveCommunications 432
12.3CellularMobileTelephoneService 434
12.4PersonalCommunicationsSystems 437
12.5IEEE802.11:WirelessLANsUsingCSMA/CA 439
12.6CellularDigitalPacketNetwork 442
12.7SatelliteCommunications 443
12.8MethodsofSatelliteCommunications 452
12.9SatelliteNetworking 457
Questions 461
Summary 461
ResearchAssignments 464
AnswerstoReviewQuestions 464
AppendixA—AcronymsandKeyTerms 467
AppendixB—CompleteExtendedASCIICodeSet 479
AppendixC—NetworkTimeline 483
AppendixD—Facsimile 497
AppendixE—AnswerKeytoOdd-NumberedQuestions 501
Index 517