CCNA学习指南 中文版 640-801 英文版PDF|Epub|txt|kindle电子书版本网盘下载

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Chapter 1 Internetworking1

Internetworking Basics3

Internetworking Models6

The Layered Approach7

Advantages of Reference Models8

The OSI Reference Model8

The Application Layer10

The Presentation Layer11

The Session Layer12

The Transport Layer13

The Network Layer18

Introduction19

The Data Link Layer20

The Physical Layer23

Ethernet Networking24

Half-and Full-Duplex Ethernet25

Ethernet at the Data Link Layer26

Ethernet at the Physical Layer31

Ethernet Cabling33

Straight-Through Cable34

Crossover Cable34

Rolled Cable35

Assessment Test35

Wireless Networking36

Data Encapsulation39

The Cisco Three-Layer Hierarchical Model41

The Core Layer42

The Distribution Layer43

The Access Layer43

Summary44

Exam Essentials44

Key Terms45

Written Lab 146

Written Lab 1.1:OSI Questions47

Written Lab 1.2:Defining the OSI Layers and Devices48

Written Lab 1.3:Identifying Collision and Broadcast Domains48

Review Questions49

Answers to Review Questions52

Answers to Written Lab 154

Answers to Written Lab 1.154

Answer to Written Lab 1.255

Answers to Written Lab 1.355

Chapter 2 Internet Protocols57

TCP/IP and the DoD Model58

The Process/Application Layer Protocols60

The Host-to-Host Layer Protocols64

The Internet Layer Protocols72

Binary to Decimal and Hexadecimal Conversion80

IP Addressing83

IP Terminology83

The Hierarchical IP Addressing Scheme83

Private IP Addresses89

Broadcast Addresses90

Introduction to Network Address Translation(NAT)92

Summary93

Exam Essentials93

Key Terms94

Review Questions95

Written Lab 295

Answers to Review Questions98

Answers to Written Lab 2100

Chapter 3 IP Subnetting and Variable Length Subnet Masks(VLSM)101

Subnetting Basics102

How to Create Subnets103

Subnet Masks104

Classless Inter-Domain Routing(CIDR)104

Subnetting Class C Addresses106

The Binary Method:Subnetting a Class C Address106

The Fast Way:Subnetting a Class C Address107

Subnetting Class B Addresses114

Subnetting Class A Addresses119

Variable Length Subnet Masks(VLSMs)122

VLSM Design123

Implementing VLSM Networks125

Troubleshooting IP Addressing129

Determining IP Address Problems130

Summary133

Exam Essentials133

Key Terms134

Written Lab 3134

Review Questions134

Answers to Review Questions138

Answers to Written Lab 3140

Chapter 4 Introduction to the Cisco IOS143

The Cisco Router User Interface144

Cisco Router IOS145

Connecting to a Cisco Router145

Bringing Up a Router146

Setup Mode148

Command-Line Interface152

Logging into the Router153

Overview of Router Modes153

CLI Prompts154

Editing and Help Features156

Gathering Basic Routing Information160

Setting Passwords161

Encrypting Your Passwords165

Banners167

Router Interfaces168

Hostnames172

Descriptions172

Viewing and Saving Configurations174

Verifying Your Configuration176

Summary182

Exam Essentials182

Commands Used in This Chapter184

Key Terms184

Written Lab 4187

Hands-on Labs187

Hands-on Lab 4.1:Logging into a Router188

Hands-on Lab 4.2:Using the Help and Editing Features188

Hands-on Lab 4.3:Saving a Router Configuration189

Hands-on Lab 4.4:Setting Your Passwords190

Hands-on Lab 4.5 Setting the Hostname,Descriptions,IPAddress,and Clock Rate192

Review Questions193

Answers to Review Questions196

Answers to Written Lab 4198

Chapter 5 IP Routing199

Routing Basics200

The IP Routing Process201

IP Routing in a Larger Network206

Configuring IP Routing in Our Network211

Static Routing212

Default Routing216

Dynamic Routing217

Routing Protocol Basics218

Administrative Distances218

Routing Protocols219

Distance-Vector Routing Protocols220

Maximum Hop Count222

Routing Loops222

Split Horizon223

Route Poisoning223

Holddowns223

Routing Information Protocol(RIP)224

RIP Timers225

Configuring RIP Routing225

Verifying the RIP Routing Tables228

Holding Down RIP Propagations229

Interior Gateway Routing Protocol(IGRP)230

Configuring IGRP Routing231

IGRP Timers231

Verifying the IGRP Routing Tables233

Verifying Your Configurations234

The show protocols Command235

The show ip protocols Command235

The debug ip rip Command237

The debug ip igrp Command238

Summary239

Exam Essentials240

Key Terms240

Commands Used in This Chapter241

Hands-on Labs242

Written Lab 5242

Hands-on Lab 5.1:Creating Static Routes243

Hands-on Lab 5.2:Dynamic Routing with RIP245

Hands-on Lab 5.3:Dynamic Routing with IGRP246

Review Questions247

Answers to Review Questions252

Answers to Written Lab 5254

Chapter 6 Enhanced IGRP(EIGRP)and Open Shortest Path First(OSPF)255

EIGRP Features and Operation256

Protocol-Dependent Modules257

Neighbor Discovery257

Reliable Transport Protocol(RTP)258

Diffusing Update Algorithm(DUAL)259

Using EIGRP to Support Large Networks259

Multiple AS260

VLSM Support and Summarization260

Route Discovery and Maintenance261

Configuring EIGRP263

Lab_A264

Lab_B265

Lab_C265

Verifying EIGRP267

Open Shortest Path First(OSPF)Basics269

OSPF Terminology271

SPF Tree Calculation273

Configuring OSPF274

Enabling OSPF274

Configuring OSPF Areas275

Verifying OSPF Configuration278

The show ip ospf Command279

The show ip ospf database Command279

The show ip ospf interface Command280

The show ip ospf neighbor Command281

The show ip protocols Command281

Configuring Loopback Interfaces282

OSPF and Loopback Interfaces282

Verifying Loopbacks and RIDs283

Summary284

Exam Essentials285

Key Terms286

Commands Used in This Chapter286

Written Lab 6287

Hands-On Labs288

Lab 6.1:Configuring and Verifying EIGRP289

Lab 6.2:Enabling the OSPF Process290

Lab 6.4:Verifying OSPF Operation291

Lab 6.3:Configuring OSPF Neighbors291

Review Questions292

Answers to Review Questions295

Answers to Written Lab 6297

Chapter 7 Layer 2 Switching299

Before Layer 2 Switching301

Switching Services303

Limitations of Layer 2 Switching304

Bridging vs.LAN Switching305

Three Switch Functions at Layer 2305

Spanning Tree Terms309

Spanning Tree Protocol(STP)309

Spanning Tree Operations310

Spanning Tree Example313

LAN Switch Types315

Cut-Through(Real Time)315

FragmentFree(Modified Cut-Through)316

Store-and-Forward316

Configuring the Catalyst 1900 and 2950 Switches316

1900 and 2950 Switch Startup317

Setting the Passwords318

Setting the Hostname320

Setting IP Information321

Configuring Interface Descriptions322

Erasing the Switch Configuration323

Summary324

Exam Essentials324

Key Terms325

Commands Used in This Chapter325

Written Lab 7326

Hands-on Labs326

Hands-on Lab 7.1:Switch Basic Administrative Configurations327

Hands-on Lab 7.2:Verifying the Switch Configurations329

Review Questions329

Answers to Review Questions333

Answers to Written Lab 7334

Chapter 8 Virtual LANs(VLANs)335

VLAN Basics336

Broadcast Control338

Security339

Flexibility and Scalability339

VLAN Memberships342

Static VLANs342

Dynamic VLANs343

Identifying VLANs343

Frame Tagging344

Inter-Switch Link(ISL)Protocol345

VLAN Identification Methods345

VLAN Trunking Protocol(VTP)346

VTP Modes of Operation347

VTP Pruning348

Routing between VLANs349

Configuring VLANs350

Assigning Switch Ports to VLANs352

Configuring Trunk Ports354

Configuring Inter-VLAN Routing355

Configuring VTP356

Configuring Switching in Our Sample Internetwork358

Summary364

Exam Essentials365

Key Terms365

Commands Used in This Chapter366

Written Lab 8367

Review Questions367

Answers to Review Questions370

Answers to Written Lab 8371

Chapter 9 Managing a Cisco Internetwork373

The Internal Components of a Cisco Router374

The Router Boot Sequence375

Understanding the Configuration Register Bits376

Managing Configuration Registers376

Checking the Current Configuration Register Value377

Changing the Configuration Register378

Recovering Passwords378

Backing Up and Restoring the Cisco IOS381

Verifying Flash Memory382

Backing Up the Cisco IOS382

Restoring or Upgrading the Cisco Router IOS384

Backing Up and Restoring the Cisco Configuration386

Backing Up the Cisco Router Configuration386

Restoring the Cisco Router Configuration388

Using Cisco Discovery Protocol(CDP)389

Getting CDP Timers and Holdtime Information389

Erasing the Configuration389

Gathering Neighbor Information390

Gathering Interface Traffic Information392

Gathering Port and Interface Information393

Using Telnet394

Telnetting into Multiple Devices Simultaneously396

Checking Telnet Connections397

Checking Telnet Users397

Closing Telnet Sessions398

Resolving Hostnames399

Building a Host Table399

Using DNS to Resolve Names401

Checking Network Connectivity403

Using the ping Command403

Using the traceroute Command404

Summary405

Exam Essentials405

Key Terms407

Commands Used in This Chapter407

Written Lab 9409

Hands-on Labs409

Hands-on Lab 9.1:Backing Up Your Router IOS410

Hands-on Lab 9.2:Upgrading or Restoring Your Router IOS410

Hands-on Lab 9.4:Using the Cisco Discovery Protocol(CDP)411

Hands-on Lab 9.3:Backing Up the Router Configuration411

Hands-on Lab 9.5:Using Telnet412

Hands-on Lab 9.6:Resolving Hostnames412

Review Questions413

Answers to Review Questions416

Answers to Written Lab 9418

Chapter 10 Internet Protocols419

Introduction to Access Lists420

Standard Access Lists423

Wildcard Masking425

Standard Access List Example426

Controlling VTY(Telnet)Access428

Extended Access Lists429

Extended Access List Example433

Named Access Lists433

Monitoring Access Lists435

Summary437

Exam Essentials438

Key Terms438

Commands Used in This Chapter439

Written Lab 10439

Hands-on Labs440

Hands-on Lab 10.1:Standard IP Access Lists440

Hands-on Lab 10.2:Extended IP Access Lists441

Review Questions443

Answers to Review Questions447

Answers to Written Lab 10449

Chapter 11 Wide Area Networking Protocols451

Introduction to Wide Area Networks452

Defining WAN Terms452

WAN Connection Types453

WAN Support454

Cabling the Wide Area Network456

Serial Transmission456

Fixed and Modular Interfaces457

Data Terminal Equipment and Data Communication Equipment457

High-Level Data-Link Control(HDLC)Protocol458

Point-to-Point Protocol(PPP)459

Link Control Protocol(LCP)Configuration Options460

PPP Session Establishment460

PPP Authentication Methods461

Configuring PPP on Cisco Routers461

Configuring PPP Authentication461

Verifying PPP Encapsulation462

Frame Relay463

Introduction to Frame Relay Technology463

Frame Relay Implementation and Monitoring472

Integrated Services Digital Network(ISDN)478

ISDN Connections479

ISDN Components479

Basic Rate Interface(BRI)482

Primary Rate Interface(PRI)483

ISDN with Cisco Routers483

Dial-on-Demand Routing(DDR)484

Configuring DDR485

Optional Commands488

DDR with Access Lists489

Verifying the ISDN Operation489

Exam Essentials490

Summary490

Key Terms491

Commands Used in This Chapter492

Written Lab 11494

Hands-on Labs495

Hands-on Lab 11.2:Configuring and Monitoring HDLC497

Hands-on Lab 11.3:Configuring Frame Relay and Subinterfaces497

Hands-on Lab 11.4:Configuring ISDN and BRI Interfaces499

Review Questions501

Answers to Review Questions505

Answers to Written Lab 11506

Appendix A Commands in This Study Guide509

Glossary521