Table of Contents

    Introduction xxx

Chapter 1 Networking Today 1

    Networks Affect Our Lives 2

    Network Components 2

    Network Representations and Topologies 4

    Common Types of Networks 5

    Internet Connections 6

    Reliable Networks 8

    Network Trends 9

    Network Security 11

    The IT Professional 12

    1.5.7 Packet Tracer—Network Representation 13

    1.9.3 Lab—Research IT and Networking Job Opportunities 16

Chapter 2 Basic Switch and End Device Configuration 19

    Cisco IOS Access 20

    IOS Navigation 21

    The Command Structure 23

    Basic Device Configuration 25

    Save Configurations 27

    Ports and Addresses 27

    Configure IP Addressing 28

    Verify Connectivity 30

    Command Reference 32

    2.3.7 Packet Tracer—Navigate the IOS 33

    2.3.8 Lab—Navigate the IOS by Using Tera Term for Console Connectivity 38

    2.5.5 Packet Tracer—Configure Initial Switch Settings 45

    2.7.6 Packet Tracer—Implement Basic Connectivity 50

    2.9.1 Packet Tracer—Basic Switch and End Device Configuration 53

    2.9.2 Lab—Basic Switch and End Device Configuration 55

Chapter 3 Protocols and Models 59

    The Rules 60

        Protocols 61

    Protocol Suites 63

    Standards Organizations 66

    Reference Models 68

    Data Encapsulation 69

    Data Access 71

    3.0.3 Class Activity—Design a Communications System 73

    3.4.4 Lab—Research Networking Standards 74

    3.5.5 Packet Tracer—Investigate the TCP/IP and OSI Models in Action 77

    3.7.9 Lab—Install Wireshark 82

    3.7.10 Lab—Use Wireshark to View Network Traffic 84

Chapter 4 Physical Layer 91

    Purpose of the Physical Layer 92

    Physical Layer Characteristics 92

    Copper Cabling 94

    UTP Cabling 96

    Fiber-Optic Cabling 97

    Wireless Media 99

    4.6.5 Packet Tracer—Connect a Wired and Wireless LAN 101

    4.6.6 Lab—View Wired and Wireless NIC Information 105

    4.7.1 Packet Tracer—Connect the Physical Layer 109

Chapter 5 Number Systems 115

    Binary Number System 116

    Hexadecimal Number System 118

Chapter 6 Data Link Layer 123

    Purpose of the Data Link Layer 124

    Topologies 126

    Data Link Frame 128

Chapter 7 Ethernet Switching 131

    Ethernet Frames 132

    Ethernet MAC Address 134

    The MAC Address Table 135

    Switch Speeds and Forwarding Methods 140

    7.1.6 Lab—Use Wireshark to Examine Ethernet Frames 142

    7.2.7 Lab—View Network Device MAC Addresses 149

    7.3.7 Lab—View the Switch MAC Address Table 155

Chapter 8 Network Layer 159

    Network Layer Characteristics 160

    IPv4 Packet 161

    IPv6 Packet 163

    How a Host Routes 164

    Introduction to Routing 166

Chapter 9 Address Resolution 171

    MAC and IP 172

    ARP 173

    IPv6 Neighbor Discovery 175

    9.1.3 Packet Tracer—Identify MAC and IP Addresses 177

    9.2.9 Packet Tracer—Examine the ARP Table 181

    9.3.4 Packet Tracer—IPv6 Neighbor Discovery 185

Chapter 10 Basic Router Configuration 191

    Configure Initial Router Settings 192

    Configure Interfaces 194

    Configure the Default Gateway 196

    Command Reference 197

    10.1.4 Packet Tracer—Configure Initial Router Settings 198

    10.3.4 Packet Tracer—Connect a Router to a LAN 202

    10.3.5 Packet Tracer—Troubleshoot Default Gateway Issues 207

    10.4.3 Packet Tracer—Basic Device Configuration 210

    10.4.4 Lab—Build a Switch and Router Network 212

Chapter 11 IPv4 Addressing 219

    IPv4 Address Structure 220

    IPv4 Unicast, Broadcast, and Multicast 224

    Types of IPv4 Addresses 224

    Network Segmentation 226

    Subnet an IPv4 Network 227

    VLSM Addressing Schemes 231

    11.5.5 Packet Tracer—Subnet an IPv4 Network 236

    11.6.6 Lab—Calculate IPv4 Subnets 241

    11.7.5 Packet Tracer—Subnetting Scenario 245

    11.9.3 Packet Tracer—VLSM Design and Implementation Practice 249

    11.10.1 Packet Tracer—Design and Implement a VLSM Addressing Scheme 253

    11.10.2 Lab—Design and Implement a VLSM Addressing Scheme 255

Chapter 12 IPv6 Addressing 261

    IPv4 Issues 262

    IPv6 Address Representation 263

    IPv6 Address Types 263

    GUA and LLA Static Configuration 265

    Dynamic Addressing for IPv6 GUAs 267

    Dynamic Addressing for IPv6 LLAs 272

    IPv6 Multicast Addresses 272

    Subnet an IPv6 Network 272

    12.6.6 Packet Tracer—Configure IPv6 Addressing 276

    12.7.4 Lab—Identify IPv6 Addresses 280

    12.9.1 Packet Tracer—Implement a Subnetted IPv6 Addressing Scheme 284

    12.9.2 Lab—Configure IPv6 Addresses on Network Devices 286

Chapter 13 ICMP 291

    ICMP Messages 292

    Ping and Traceroute Tests 296

    Command Reference 297

    13.2.6 Packet Tracer—Verify IPv4 and IPv6 Addressing 297

    13.2.7 Packet Tracer—Use Ping and Traceroute to Test Network Connectivity 301

    13.3.1 Packet Tracer—Use ICMP to Test and Correct Network Connectivity 305

    13.3.2 Lab—Use Ping and Traceroute to Test Network Connectivity 307

Chapter 14 Transport Layer 319

    Transportation of Data 320

    TCP Overview 322

    UDP Overview 325

    Port Numbers 327

    TCP Communication Process 329

    Reliability and Flow Control 332

    UDP Communication 334

    Command Reference 336

    14.8.1 Packet Tracer—TCP and UDP Communications 336

Chapter 15 Application Layer 343

    Application, Presentation, and Session 344

    Application Layer 344

    Peer-to-Peer 346

    Web and Email Protocols 347

    IP Addressing Services 349

    File Sharing Services 353

    Command Reference 355

    15.4.8 Lab—Observe DNS Resolution 355

Chapter 16 Network Security Fundamentals 359

    Security Threats and Vulnerabilities 360

    Network Attacks 361

    Network Attack Mitigation 364

    Device Security 366

    Command Reference 368

    16.2.6 Lab—Research Network Security Threats 368

    16.4.6 Packet Tracer—Configure Secure Passwords and SSH 372

    16.4.7 Lab—Configure Network Devices with SSH 375

    16.5.1 Packet Tracer—Secure Network Devices 381

    16.5.1 Lab—Secure Network Devices 383

Chapter 17 Build a Small Network 389

    Devices in a Small Network 390

    Small Network Applications and Protocols 392

    Scale to Larger Networks 394

    Verify Connectivity 395

    Host and IOS Commands 397

    Troubleshooting Methodologies 402

    Troubleshooting Scenarios 403

    Command Reference 405

    17.4.6 Lab—Test Network Latency with Ping and Traceroute 406

    17.5.9 Packet Tracer—Interpret show Command Output 411

    17.7.6 Lab—Troubleshoot Connectivity Issues 413

    17.7.7 Packet Tracer—Troubleshoot Connectivity Issues 418

    17.8.1 Lab—Design and Build a Small Network 422

    17.8.2 Packet Tracer—Skills Integration Challenge 423

    17.8.3 Packet Tracer—Troubleshooting Challenge 426

About the Author

Allan Johnson entered the academic world in 1999 after 10 years as a business owner/operator to dedicate his efforts to his passion for teaching. He holds both an MBA and an M.Ed in occupational training and development. He taught a variety of technology courses to high school students and is an adjunct instructor at Del Mar College. Since 2006, Allan has worked full time for Cisco Networking Academy in several roles. He is currently engaged as Curriculum Lead.

Cisco Networking Academy isan innovative Cisco education initiative that delivers information andcommunication technology skills to improve career and economic opportunitiesaround the world. The Academy provides online courses, interactive tools, andlab activities to prepare individuals for information technology and networkingcareers in virtually every industry.