CCENT Study Guide: Exam 100-105 (ICND1)

by Lammle, Todd

• ISBN13: 9781119288787
• ISBN10: 1119288789
• Edition: 3rd
• Format: Paperback
• Copyright: 2016-07-05
• Publisher: Sybex Inc

Summary

Cisco has announced big changes to its certification program.

As of February 24, 2020, all current certifications will be retired, and Cisco will begin offering new certification programs.

The good news is if you’re working toward any current CCNA certification, keep going. You have until February 24, 2020 to complete your current CCNA. If you already have CCENT/ICND1 certification and would like to earn CCNA, you have until February 23, 2020 to complete your CCNA certification in the current program.  Likewise, if you’re thinking of completing the current CCENT/ICND1, ICND2, or CCNA Routing and Switching certification, you can still complete them between now and February 23, 2020. 

Complete CCENT preparation with hands-on practice and robust study aids

The CCENT Study Guide, 3^rd Edition offers complete conceptual and practical study tools for the Cisco Certified Entry Networking Technician exam. Written by networking expert Todd Lammle, this study guide provides everything you need to pass the CCENT with flying colors. 100% coverage of the all exam objectives includes detailed discussion on IP data networks, IPv4 and IPv6 addressing, switching and routing, network security, and much more. Todd draws on 30 years of experience to give you practical examples and real-world insights that go way beyond exam prep, and plenty of hands-on labs help you gain experience with important tasks. The Sybex interactive online learning tools include a pre-assessment test to show you how much you already know, two bonus ICND-1 practice exams to test your understanding, and hundreds of sample questions and over 100 flashcards provide quick review.

The CCENT is the entry-level certification for those looking to break into the networking field. As a part of the CCNA certification process, the exam is comprehensive—and a comprehensive study guide is essential. This study guide helps you develop the skills and knowledge you need to be confident on exam day.

• Review all CCENT exam objectives
• Access online study tools and practice ICND1 exams
• Get hands-on experience with dozens of labs
• Master switching and routing, troubleshooting, security, and more

Don't bother parsing technical references or trying to figure it out yourself. This book allows you to learn and review with networking's leading authority, with clear explanations, practical instruction, and real-world insight. When you're ready for the next step in your career, the CCENT Study Guide, 3^rd Edition gets you on track to succeed on the CCENT exam.

Author Biography

Todd Lammle, Cisco certified in almost every category, is the authority on Cisco networking and certification. His three decades of real-world experience is prevalent in his writing. He is an experienced networking engineer with very practical experience working on the largest bounded and unbounded networks in the world at such companies as Xerox, Hughes Aircraft, Texaco, AAA, Cisco, and Toshiba, among many others. Todd has published over 60 books, including the very popular and bestselling CCNA: Cisco Certified Network Associate Study Guide and Cisco Firepower NGIPS. Todd runs an international training company from Texas, and a large scale consulting business out of Colorado. You can reach Todd through his forum and blog at www.lammle.com/ccna.

Table of Contents

Introduction xxi

Assessment Test xxxvii

Chapter 1 Internetworking 1

Internetworking Basics 2

Internetworking Models 11

The Layered Approach 11

Advantages of Reference Models 12

The OSI Reference Model 13

The Application Layer 15

The Presentation Layer 16

The Session Layer 16

The Transport Layer 16

The Network Layer 22

The Data Link Layer 24

The Physical Layer 27

Summary 29

Exam Essentials 29

Written Labs 30

Written Lab 1.1: OSI Questions 30

Written Lab 1.2: Defining the OSI Layers and Devices 32

Written Lab 1.3: Identifying Collision and Broadcast Domains 32

Review Questions 34

Chapter 2 Ethernet Networking and Data Encapsulation 39

Ethernet Networks in Review 40

Collision Domain 41

Broadcast Domain 42

CSMA/CD 43

Half- and Full-Duplex Ethernet 45

Ethernet at the Data Link Layer 47

Ethernet at the Physical Layer 53

Ethernet Cabling 57

Straight-Through Cable 57

Crossover Cable 58

Rolled Cable 60

Fiber Optic 62

Data Encapsulation 64

The Cisco Three-Layer Hierarchical Model 67

The Core Layer 69

The Distribution Layer 69

The Access Layer 70

Summary 70

Exam Essentials 71

Written Labs 72

Written Lab 2.1: Binary/Decimal/Hexadecimal Conversion 72

Written Lab 2.2: CSMA/CD Operations 75

Written Lab 2.3: Cabling 76

Written Lab 2.4: Encapsulation 76

Review Questions 77

Chapter 3 Introduction to TCP/IP 83

Introducing TCP/IP 84

A Brief History of TCP/IP 85

TCP/IP and the DoD Model 85

The Process/Application Layer Protocols 87

The Host-to-Host or Transport Layer Protocols 97

The Internet Layer Protocols 106

IP Addressing 114

IP Terminology 114

The Hierarchical IP Addressing Scheme 115

Private IP Addresses (RFC 1918) 120

IPv4 Address Types 121

Layer 2 Broadcasts 122

Layer 3 Broadcasts 122

Unicast Address 123

Multicast Address 124

Summary 125

Exam Essentials 125

Written Labs 127

Written Lab 3.1: TCP/IP 127

Written Lab 3.2: Mapping Applications to the DoD Model 127

Review Questions 129

Chapter 4 Easy Subnetting 133

Subnetting Basics 134

How to Create Subnets 136

Subnet Masks 136

Classless Inter-Domain Routing (CIDR) 138

IP Subnet-Zero 140

Subnetting Class C Addresses 140

Subnetting Class B Addresses 152

Subnetting Class A Addresses 161

Summary 164

Exam Essentials 164

Written Labs 165

Written Lab 4.1: Written Subnet Practice #1 165

Written Lab 4.2: Written Subnet Practice #2 166

Written Lab 4.3: Written Subnet Practice #3 167

Review Questions 168

Chapter 5 VLSMs, Summarization, and Troubleshooting TCP/IP 173

Variable Length Subnet Masks (VLSMs) 174

VLSM Design 176

Implementing VLSM Networks 177

Summarization 184

Troubleshooting IP Addressing 187

Determining IP Address Problems 190

Summary 194

Exam Essentials 195

Written Lab 5 196

Lab 5.1: Summarization Practice 196

Review Questions 197

Chapter 6 Cisco’s Internetworking Operating System (IOS) 203

The IOS User Interface 204

Cisco IOS 204

Connecting to a Cisco IOS Device 205

Bringing Up a Switch 207

Command-Line Interface (CLI) 207

Entering the CLI 208

Overview of Router Modes 208

CLI Prompts 209

Editing and Help Features 211

Administrative Configurations 216

Hostnames 217

Banners 217

Setting Passwords 219

Encrypting Your Passwords 225

Descriptions 227

Router and Switch Interfaces 229

Bringing Up an Interface 232

Viewing, Saving, and Erasing Configurations 238

Deleting the Configuration and Reloading the Device 240

Verifying Your Configuration 240

Summary 253

Exam Essentials 254

Written Lab 6: IOS Understanding 257

Hands-on Labs 257

Hands-on Lab 6.1: Erasing an Existing Configuration 258

Hands-on Lab 6.2: Exploring User, Privileged, and Configuration Modes 258

Hands-on Lab 6.3: Using the Help and Editing Features 259

Hands-on Lab 6.4: Saving a Configuration 260

Hands-on Lab 6.5: Setting Passwords 261

Hands-on Lab 6.6: Setting the Hostname, Descriptions, IP Address, and Clock Rate 263

Review Questions 265

Chapter 7 Managing a Cisco Internetwork 271

The Internal Components of a Cisco Router and Switch 272

The Router and Switch Boot Sequence 273

Backing Up and Restoring the Cisco Configuration 274

Backing Up the Cisco Configuration 275

Restoring the Cisco Configuration 277

Erasing the Configuration 277

Configuring DHCP 278

DHCP Relay 279

Verifying DHCP on Cisco IOS 280

Syslog 281

Configuring and Verifying Syslog 283

Network Time Protocol (NTP) 286

Exploring Connected Devices Using CDP and LLDP 287

Getting CDP Timers and Holdtime Information 288

Gathering Neighbor Information 289

Documenting a Network Topology Using CDP 293

Using Telnet 296

Telnetting into Multiple Devices Simultaneously 298

Checking Telnet Connections 298

Checking Telnet Users 299

Closing Telnet Sessions 299

Resolving Hostnames 300

Building a Host Table 300

Using DNS to Resolve Names 302

Checking Network Connectivity and Troubleshooting 304

Using the ping Command 304

Using the traceroute Command 305

Debugging 306

Using the show processes Command 308

Summary 309

Exam Essentials 309

Written Labs 7 311

Written Lab 7.1: IOS Management 311

Written Lab 7.2: Router Memory 312

Hands-on Labs 312

Hands-on Lab 7.1: Backing Up the Router Configuration 313

Hands-on Lab 7.2: Using the Cisco Discovery Protocol (CDP) 313

Hands-on Lab 7.3: Using Telnet 314

Hands-on Lab 7.4: Resolving Hostnames 315

Review Questions 317

Chapter 8 Managing Cisco Devices 321

Managing the Configuration Register 322

Understanding the Configuration Register Bits 322

Checking the Current Configuration Register Value 324

Boot System Commands 325

Recovering Passwords 326

Backing Up and Restoring the Cisco IOS 329

Verifying Flash Memory 330

Backing Up the Cisco IOS 331

Restoring or Upgrading the Cisco Router IOS 332

Using the Cisco IOS File System (Cisco IFS) 335

Licensing 339

Right-To-Use Licenses (Evaluation Licenses) 342

Backing Up and Uninstalling the License 345

Summary 346

Exam Essentials 346

Written Lab 8 347

Written Lab 8.1: IOS Management 348

Hands-on Labs 348

Hands-on Lab 8.1: Backing Up Your Router IOS 348

Hands-on Lab 8.2: Upgrading or Restoring Your Router IOS 349

Review Questions 350

Chapter 9 IP Routing 355

Routing Basics 357

The IP Routing Process 359

The Cisco Router Internal Process 364

Testing Your IP Routing Understanding 365

Configuring IP Routing 370

Corp Configuration 371

SF Configuration 373

LA Configuration 377

Configuring IP Routing in Our Network 379

Static Routing 380

Default Routing 385

Dynamic Routing 388

Routing Protocol Basics 388

Routing Information Protocol (RIP) 390

Configuring RIP Routing 391

Holding Down RIP Propagations 394

Summary 397

Exam Essentials 397

Written Lab 9 398

Hands-on Labs 399

Hands-on Lab 9.1: Creating Static Routes 400

Hands-on Lab 9.2: Configuring RIP Routing 401

Review Questions 403

Chapter 10 Layer 2 Switching 409

Switching Services 410

Three Switch Functions at Layer 2 411

Port Security 415

Configuring Catalyst Switches 420

Catalyst Switch Configuration 421

Verifying Cisco Catalyst Switches 428

Summary 431

Exam Essentials 431

Written Lab 10 432

Hands-on Labs 432

Lab 10.1: Configuring Layer 2 Switches 433

Lab 10.2: Verifying Layer 2 Switches 434

Lab 10.3: Configuring Port Security 435

Review Questions 436

Chapter 11 VLANs and Inter-VLAN Routing 441

VLAN Basics 442

Broadcast Control 445

Security 446

Flexibility and Scalability 446

Identifying VLANs 447

Frame Tagging 449

VLAN Identification Methods 450

Routing between VLANs 452

Configuring VLANs 454

Assigning Switch Ports to VLANs 457

Configuring Trunk Ports 459

Configuring Inter-VLAN Routing 463

Summary 470

Exam Essentials 470

Written Lab 11 471

Hands-on Labs 471

Hands-on Lab 11.1: Configuring and Verifying VLANs 472

Hands-on Lab 11.2: Configuring and Verifying Trunk Links 472

Hands-on Lab 11.3: Configuring Router on a Stick Routing 473

Hands-on Lab 11.4: Configuring IVR with a Layer 3 Switch 474

Review Questions 475

Chapter 12 Security 481

Perimeter, Firewall, and Internal Routers 482

Introduction to Access Lists 483

Mitigating Security Issues with ACLs 486

Standard Access Lists 487

Wildcard Masking 488

Standard Access List Example 490

Controlling VTY (Telnet/SSH) Access 494

Extended Access Lists 495

Extended Access List Example 1 499

Extended Access List Example 2 501

Extended Access List Example 3 502

Named ACLs 503

Remarks 505

Monitoring Access Lists 506

Summary 508

Exam Essentials 509

Written Lab 12 509

Hands-on Labs 510

Hands-on Lab 12.1: Standard IP Access Lists 511

Hands-on Lab 12.2: Extended IP Access Lists 512

Review Questions 515

Chapter 13 Network Address Translation (NAT) 519

When Do We Use NAT? 520

Types of Network Address Translation 522

NAT Names 522

How NAT Works 523

Static NAT Configuration 525

Dynamic NAT Configuration 525

PAT (Overloading) Configuration 526

Simple Verification of NAT 527

Testing and Troubleshooting NAT 527

Summary 533

Exam Essentials 533

Written Lab 13 533

Hands-on Labs 534

Lab 13.1: Preparing for NAT 535

Lab 13.2: Configuring Dynamic NAT 536

Lab 13.3: Configuring PAT 538

Review Questions 540

Chapter 14 Internet Protocol Version 6 (IPv6) 545

Why Do We Need IPv6? 547

The Benefits and Uses of IPv6 547

IPv6 Addressing and Expressions 549

Shortened Expression 549

Address Types 550

Special Addresses 552

How IPv6 Works in an Internetwork 553

Manual Address Assignment 553

Stateless Autoconfiguration (eui-64) 554

DHCPv6 (Stateful) 557

IPv6 Header 557

ICMPv6 559

IPv6 Routing Protocols 563

Static Routing with IPv6 563

Configuring IPv6 on Our Internetwork 564

Configuring Routing on Our Internetwork 567

Summary 570

Exam Essentials 571

Written Labs 14 571

Written Lab 14.1 571

Written Lab 14.2 572

Hands-on Labs 572

Hands-on Lab 14.1: Manual and Stateful Autoconfiguration 572

Hands-on Lab 14.2: Static and Default Routing 574

Review Questions 575

Appendix A Answers to Written Labs 579

Chapter 1: Internetworking 580

Written Lab 1.1: OSI Questions 580

Written Lab 1.2: Defining the OSI Layers and Devices 581

Written Lab 1.3: Identifying Collision an Broadcast Domains 581

Chapter 2: Ethernet Networking and Data Encapsulation 582

Written Lab 2.1: Binary/Decimal/Hexadecimal Conversion 582

Written Lab 2.2: CSMA/CD Operations 584

Written Lab 2.3: Cabling 584

Written Lab 2.4: Encapsulation 584

Chapter 3: Introduction to TCP/IP 585

Written Lab 3.1: TCP/IP 585

Written Lab 3.2: Mapping Applications to the DoD Model 585

Chapter 4: Easy Subnetting 586

Written Lab 4.1: Written Subnet Practice #1 586

Written Lab 4.2: Written Subnet Practice #2 587

Written Lab 4.3: Written Subnet Practice #3 587

Chapter 5: VLSMs, Summarization and Troubleshooting TCP/IP 588

Chapter 6: Cisco’s Internetworking Operating System (IOS) 588

Written Lab 6: Cisco IOS 588

Chapter 7: Managing a Cisco Internetwork 589

Written Lab 7.1: IOS Management 589

Written Lab 7.2: Router Memory 589

Chapter 8: Managing Cisco Devices 590

Written Lab 8.1: IOS Management 590

Chapter 9: IP Routing 590

Chapter 10: Layer 2 Switching 591

Chapter 11: VLANs and InterVLAN Routing 591

Chapter 12: Security 592

Chapter 13: Network Address Translation (NAT) 593

Chapter 14: Internet Protocol Version 6 (IPv6) 593

Written Lab 14.1: IPv6 Foundation 593

Written Lab 14.2: EUI-64 Format 594

Appendix B Answers to Review Questions 595

Chapter 1: Internetworking 596

Chapter 2: Ethernet Networking and Data Encapsulation 598

Chapter 3: Introduction to TCP/IP 600

Chapter 4: Easy Subnetting 601

Chapter 5: VLSMs, Summarization, and Troubleshooting TCP/IP 603

Chapter 6: Cisco’s Internetworking Operating System (IOS) 605

Chapter 7: Managing a Cisco Internetwork 607

Chapter 8: Managing Cisco Devices 608

Chapter 9: IP Routing 610

Chapter 10: Layer 2 Switching 611

Chapter 11: VLANs and InterVLAN Routing 613

Chapter 12: Security 615

Chapter 13: Network Address Translation (NAT) 617

Chapter 14: Internet Protocol Version 6 (IPv6) 618

Appendix C Disabling and Configuring Network Services 621

Blocking SNMP Packets 622

Disabling Echo 622

Turning off BootP and Auto-Config 623

Disabling the HTTP Interface 624

Disabling IP Source Routing 624

Disabling Proxy ARP 624

Disabling Redirect Messages 624

Disabling the Generation of ICMP Unreachable Messages 625

Disabling Multicast Route Caching 625

Disabling the Maintenance Operation Protocol (MOP) 625

Turning Off the X.25 PAD Service 626

Enabling the Nagle TCP Congestion Algorithm 626

Logging Every Event 626

Disabling Cisco Discovery Protocol 627

Disabling the Default Forwarded UDP Protocols 627

Cisco’s auto secure 628

Index 631