CCNA Routing and Switching Study Guide SYBEX 200-120

Contents

Introduction xxvii

 

ICND1 (100-101) Exam Objectives xxxviii

 

ICND2 (200-101) Exam Objectives xliv

 

CCNA Composite (200-120) Exam Objectives xlvii

 

Assessment Test lviii

 

Part I ICND1 1

 

Chapter 1 Internetworking 3

 

Internetworking Basics 4

 

Internetworking Models 12

 

The Layered Approach 13

 

Advantages of Reference Models 14

 

The OSI Reference Model 14

 

The Application Layer 16

 

The Presentation Layer 17

 

The Session Layer 17

 

The Transport Layer 18

 

The Network Layer 23

 

The Data Link Layer 25

 

The Physical Layer 28

 

Summary 29

 

Exam Essentials 30

 

Written Labs 32

 

Written Lab 1.1: OSI Questions 32

 

Written Lab 1.2: Defining the OSI Layers and Devices 33

 

Written Lab 1.3: Identifying Collision and

 

Broadcast Domains 34

 

Review Questions 35

 

Chapter 2 Ethernet Networking and Data Encapsulation 41

 

Ethernet Networks in Review 42

 

Collision Domain 43

 

Broadcast Domain 44

 

CSMA/CD 45

 

Half- and Full-Duplex Ethernet 47

 

Ethernet at the Data Link Layer 49

 

Ethernet at the Physical Layer 55

Ethernet Cabling 59

 

Straight-through Cable 60

 

Crossover Cable 60

 

Rolled Cable 62

 

Fiber Optic 64

 

Data Encapsulation 66

 

The Cisco three-layer Hierarchical Model 70

 

The Core Layer 70

 

The Distribution Layer 72

 

The Access Layer 72

 

Summary 73

 

Exam Essentials 73

 

Written Labs 74

 

Written Lab 2.1: Binary/Decimal/Hexadecimal Conversion 75 Written Lab 2.2: CSMA/CD Operations 79

 

Written Lab 2.3: Cabling 79

 

Written Lab 2.4: Encapsulation 80

 

Review Questions 81

 

Chapter 3 Introduction to TCP/IP 87

 

Introducing TCP/IP 88

 

A Brief History of TCP/IP 89

 

TCP/IP and the DoD Model 89

 

The Process/Application Layer Protocols 91

 

The Host-to-host Layer Protocols 101

 

The Internet Layer Protocols 110

 

IP Addressing 118

 

IP Terminology 118

 

The Hierarchical IP Addressing Scheme 119

 

Private IP Addresses (RFC 1918) 124

 

IPv4 Address Types 126

 

Layer 2 Broadcasts 126

 

Layer 3 Broadcasts 126

 

Unicast Address 127

 

Multicast Address 128

 

Summary 129

 

Exam Essentials 130

 

Written Labs 132

 

Written Lab 3.1: TCP/IP 132

 

Written Lab 3.2: Mapping Applications to the DoD Model 132 Review Questions 134

 

Chapter 4 Easy Subnetting 139

 

Subnetting Basics 140

 

How to Create Subnets 142

 

Subnet Masks 142

Classless Inter-Domain Routing (CIDR) 144

 

IP Subnet-Zero 146

 

Subnetting Class C Addresses 146

 

Subnetting Class B Addresses 158

 

Subnetting Class A Addresses 167

 

Summary 170

 

Exam Essentials 170

 

Written Labs 171

 

Written Lab 4.1: Written Subnet Practice #1 171

 

Written Lab 4.2: Written Subnet Practice #2 172

 

Written Lab 4.3: Written Subnet Practice #3 173

 

Review Questions 174

 

Chapter 5 VLSMs, Summarization, and

 

Troubleshooting TCP/IP 181

 

Variable Length Subnet Masks (VLSMs) 182

 

VLSM Design 184

 

Implementing VLSM Networks 184

 

Summarization 193

 

Troubleshooting IP Addressing 196

 

Determining IP Address Problems 198

 

Summary 203

 

Exam Essentials 204

 

Written Lab 5 205

 

Review Questions 206

 

Chapter 6 Cisco's Internetworking Operating System (IOS) 213

 

The IOS User Interface 215

 

Cisco IOS 216

 

Connecting to a Cisco IOS Device 216

 

Bringing Up a Switch 218

 

Command-line Interface (CLI) 219

 

Entering the CLI 219

 

Overview of Router Modes 219

 

CLI Prompts 220

 

Editing and Help Features 223

 

Administrative Configurations 228

 

Hostnames 228

 

Banners 229

 

Setting Passwords 231

 

Encrypting Your Passwords 237

 

Descriptions 239

 

Router and Switch Interfaces 241

 

Bringing Up an Interface 244

Viewing, Saving, and Erasing Configurations 250

 

Deleting the Configuration and Reloading the Device 252

 

Verifying Your Configuration 253

 

Summary 264

 

Exam Essentials 265

 

Written Lab 6 268

 

Hands-on Labs 268

 

Hands-on Lab 6.1: Erasing an Existing Configuration 269

 

Hands-on Lab 6.2: Exploring User, Privileged, and Configuration Modes 269

 

Hands-on Lab 6.3: Using the Help and Editing Features 270 Hands-on Lab 6.4: Saving a Configuration 271

 

Hands-on Lab 6.5: Setting Passwords 272

 

Hands-on Lab 6.6: Setting the Hostname, Descriptions,

 

IP Address, and Clock Rate 274

 

Review Questions 277

 

Chapter 7 Managing a Cisco Internetwork 283

 

The Internal Components of a Cisco Router and Switch 284

 

The Router and Switch Boot Sequence 285

 

Backing Up and Restoring the Cisco Configuration 286

 

Backing Up the Cisco Configuration 286

 

Restoring the Cisco Configuration 288

 

Erasing the Configuration 289

 

Configuring DHCP 290

 

DHCP Relay 291

 

Verifying DHCP on Cisco IOS 292

 

Network Time Protocol (NTP) 293

 

Using Cisco Discovery Protocol (CDP) 295

 

Getting CDP Timers and Holdtime Information 295

 

Gathering Neighbor Information 296

 

Documenting a Network Topology Using CDP 300

 

Using Telnet 303

 

Telnetting into Multiple Devices Simultaneously 305

 

Checking Telnet Connections 306

 

Checking Telnet Users 306

 

Closing Telnet Sessions 306

 

Resolving Hostnames 307

 

Building a Host Table 307

 

Using DNS to Resolve Names 309

 

Checking Network Connectivity and Troubleshooting 311

 

Using the ping Command 312

 

Using the traceroute Command 312

Debugging 314

 

Using the show processes Command 316

 

Summary 317

 

Exam Essentials 317

 

Written Lab 7 319

 

Written Lab 7.1: IOS Management 319

 

Written Lab 7.2: Router Memory 319

 

Hands-on Labs 320

 

Hands-on Lab 7.1: Backing Up the Router Configuration 320 Hands-on Lab 7.2: Using the Cisco Discovery Protocol (CDP) 321

 

Hands-on Lab 7.3: Using Telnet 322

 

Hands-on Lab 7.4: Resolving Hostnames 323

 

Review Questions 325

 

Chapter 8 IP Routing 331

 

Routing Basics 333

 

The IP Routing Process 335

 

The Cisco Router Internal Process 341

 

Testing Your IP Routing Understanding 342

 

Configuring IP Routing 346

 

Configuring IP Routing in Our Network 356

 

Static Routing 357

 

Default Routing 362

 

Dynamic Routing 365

 

Routing Protocol Basics 365

 

Routing Information Protocol (RIP) 367

 

Configuring RIP Routing 367

 

Holding Down RIP Propagations 371

 

Summary 373

 

Exam Essentials 374

 

Written Lab 8 376

 

Hands-on Labs 376

 

Hands-on Lab 8.1: Creating Static Routes 377

 

Hands-on Lab 8.2: Configuring RIP Routing 378

 

Review Questions 380

 

Chapter 9 Open Shortest Path First (OSPF) 385

 

Open Shortest Path First (OSPF) Basics 386

 

OSPF Terminology 389

 

OSPF Operation 391

 

Configuring OSPF 393

 

Enabling OSPF 393

 

Configuring OSPF Areas 394

 

Configuring Our Network with OSPF 397