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All-star N10-006 prep, fully updated for the new exam
The CompTIA Network+ Study Guide is your one-stop comprehensive resource in preparing for exam N10-006 Bestselling author and networking Guru Todd Lammle guides you through 100% of all exam objectives detailing the fundamental concepts you will need to know to prepare for the exam. Coverage includes network technologies, installation and configuration, media and topologies, security, and much more, plus practical examples drawn from real-world situations. You also gain access to practice exams and electronic flashcards that facilitate information retention and reinforce learning, giving you the confidence you need to succeed on exam day.

CompTIA´s Network+ certification covers advances in networking technology and reflects changes in associated job tasks. The exam emphasizes network implementation and support, and includes expanded coverage of wireless networking topics. This guide has been fully updated to align with the latest version of the exam, providing candidates with a thorough and up-to-date exam prep resource.

Review 100% of the Network+ exam objectives
Get clear, concise insight on crucial networking maintenance topics
Study practical examples drawn from real-world experience
Utilize leading-edge exam preparation software
CompTIA Network+ Study Guide gives you the confidence and know-how to become a Network+ certified professional.



Table of Contents

Introduction xxix
Assessment Test xli

Chapter 1 Introduction to Networks 1

First Things First: What's a Network? 2

The Local Area Network 3

Common Network Components 5

Wide Area Network 8

Network Architecture: Peer-to-Peer or Client-Server? 10

Physical Network Topologies 12

Bus Topology 12

Star Topology 13

Ring Topology 14

Mesh Topology 15

Point-to-Point Topology 16

Point-to-Multipoint Topology 17

Hybrid Topology 18

Topology Selection, Backbones, and Segments 19

Selecting the Right Topology 19

The Network Backbone 20

Network Segments 20

Summary 21

Exam Essentials 22

Written Labs 22

Review Questions 23

Chapter 2 The Open Systems Interconnection Specifications 27

Internetworking Models 28

The Layered Approach 29

Advantages of Reference Models 29

The OSI Reference Model 30

The Application Layer 32

The Presentation Layer 33

The Session Layer 33

The Transport Layer 33

The Network Layer 40

The Data Link Layer 43

The Physical Layer 45

Introduction to Encapsulation 46

Modulation Techniques 47

Summary 47

Exam Essentials 48

Written Lab 49

Review Questions 50

Chapter 3 Networking Topologies, Connectors, and Wiring Standards 55

Physical Media 57

Coaxial Cable 58

Twisted-Pair Cable 60

Fiber-Optic Cable 64

Media Converters 69

Serial Cables 71

Cable Properties 73

Transmission Speeds 74

Distance 74

Duplex 74

Noise Immunity (Security, EMI) 74

Frequency 75

Wiring Standards 75

568A vs 568B 76

Straight-Through Cable 78

Crossover Cable 78

Rolled/Rollover Cable 80

T1 Crossover Cable 81

Installing Wiring Distributions 82

Summary 85

Exam Essentials 85

Written Lab 86

Review Questions 87

Chapter 4 The Current Ethernet Specifications 91

Network Basics 93

Ethernet Basics 95

Collision Domain 95

Broadcast Domain 96

CSMA/CD 96

Broadband/Baseband 98

Bit Rates vs Baud Rate 98

Wavelength 98

Sampling -Size 99

Half- and Full-Duplex Ethernet 99

Ethernet at the Data Link Layer 101

Binary to Decimal and Hexadecimal Conversion 102

Ethernet Addressing 105

Ethernet Frames 106

Ethernet at the Physical Layer 108

Ethernet over Other Standards (IEEE 1905.1-2013) 114

Ethernet over Power Line 114

Ethernet over HDMI 116

Summary 117

Exam Essentials 117

Written Lab 117

Review Questions 123

Chapter 5 Networking Devices 127

Common Network Connectivity Devices 129

Network Interface Card 130

Hub 131

Bridge 132

Switch 132

Router 133

Firewall 137

IDS/IPS 138

HIDS 138

Access Point 138

Dynamic Host Configuration Protocol Server 139

Other Specialized Devices 144

Multilayer Switch 144

Load Balancer 145

Domain Name Service Server 145

Proxy Server 150

Encryption Devices 151

Analog Modem 152

Packet Shaper 153

VPN Concentrator 153

Planning and Implementing a Basic SOHO Network Using Network Segmentation 154

Determining Requirements 154

Switches and Bridges at the Data Link Layer 161

Hubs at the Physical Layer 162

Environmental Considerations 163

Summary 164

Exam Essentials 164

Written Lab 165

Review Questions 166

Chapter 6 Introduction to the Internet Protocol 171

Introducing TCP/IP 173

A Brief History of TCP/IP 173

TCP/IP and the DoD Model 174

The Process/Application Layer Protocols 176

The Host-to-Host Layer Protocols 184

The Internet Layer Protocols 189

Data Encapsulation 194

Summary 198

Exam Essentials 198

Written Lab 198

Review Questions 200

Chapter 7 IP Addressing 205

IP Terminology 206

The Hierarchical IP Addressing Scheme 207

Network Addressing 208

Private IP Addresses (RFC 1918) 212

IPv4 Address Types 214

Layer 2 Broadcasts 214

Layer 3 Broadcasts 215

Unicast Address 215

Multicast Address (Class D) 215

Internet Protocol Version 6 (IPv6) 216

Why Do We Need IPv6? 216

The Benefits of and Uses for IPv6 217

IPv6 Addressing and Expressions 218

Shortened Expression 219

Address Types 219

Special Addresses 220

Stateless Autoconfiguration (EUI-64) 221

DHCPv6 (Stateful) 223

Migrating to IPv6 223

Summary 225

Exam Essentials 226

Written Lab 227

Written Lab 7.1 227

Written Lab 7.2 227

Written Lab 7.3 228

Review Questions 229

Chapter 8 IP Subnetting, Troubleshooting IP, and Introduction to NAT 233

Subnetting Basics 234

How to Create Subnets 235

Subnet Masks 236

Classless Inter-Domain Routing (CIDR) 237

Subnetting Class C Addresses 239

Subnetting Class B Addresses 249

Troubleshooting IP Addressing 256

Determining IP Address Problems 259

Introduction to Network Address Translation (NAT) 264

Types of Network Address Translation 265

NAT Names 266

How NAT Works 267

Summary 268

Exam Essentials 269

Written Labs 269

Review Questions 271

Chapter 9 Introduction to IP Routing 277

Routing Basics 278

The IP Routing Process 281

Testing Your IP Routing Understanding 287

Static and Dynamic Routing 288

Summary 291

Exam Essentials 292

Written Lab 292

Review Questions 293

Chapter 10 Routing Protocols 297

Routing Protocol Basics 299

Administrative Distances 300

Classes of Routing Protocols 302

Distance Vector Routing Protocols 303

Routing Information Protocol (RIP) 305

RIP Version 2 (RIPv2) 305

VLSM and Discontiguous Networks 306

EIGRP 309

Border Gateway Protocol