CompTIA Network+ N10-005 Cert Guide with MyITCertificationlab

Kevin Wallace, CCIEx2 (Voice and R/S) #7945, CCSI #20061 With Cisco experience dating back to 1989 (on a Cisco AGS+ router running Cisco IOS 7.x), Kevin has been a network design specialist for the Walt Disney World Resort, a Senior Technical Instructor for SkillSoft, and a network manager for Eastern Kentucky University. Kevin holds a bachelor’s of science degree in electrical engineering (focusing on digital communications) from the University of Kentucky, and has authored or co-authored multiple books for Cisco Press, including: Voice over IP First-Step, CVOICE Foundation Learning Guide, TSHOOT Cert Kit, TSHOOT Official Certification Guide, and ROUTE Cert Kit. Kevin’s website is 1ExamAMonth.com.

   Introduction xxvi

Chapter 1 Introducing Computer Networks 3

Foundation Topics 4

Defining a Network 4

  The Purpose of Networks 4

  Overview of Network Components 5

Networks Defined by Geography 7

  LAN 7

  WAN 8

 Other Categories of Networks 9

  CAN 9

  MAN 9

  PAN 9

Networks Defined by Topology 9

  Physical Versus Logical Topology 10

  Bus Topology 11

  Ring Topology 13

  Star Topology 15

  Hub-and-Spoke Topology 16

  Full-Mesh Topology 18

  Partial-Mesh Topology 19

Networks Defined by Resource Location 20

  Client-Server Networks 20

  Peer-to-Peer Networks 22

Summary 24

Exam Preparation Tasks 25

  Review All the Key Topics 25

  Complete Tables and Lists from Memory 25

  Define Key Terms 25

  Review Questions 26

Chapter 2 Dissecting the OSI Model 29

Foundation Topics 30

The Purpose of Reference Models 30

The OSI Model 31

  Layer 1: The Physical Layer 33

  Layer 2: The Data Link Layer 36

  Media Access Control 37

  Logical Link Control 37

  Layer 3: The Network Layer 39

  Layer 4: The Transport Layer 42

  Layer 5: The Session Layer 44

  Layer 6: The Presentation Layer 45

  Layer 7: The Application Layer 46

The TCP/IP Stack 47

  Layers of the TCP/IP Stack 47

  Common Application Protocols in the TCP/IP Stack 51

Summary 53

Exam Preparation Tasks 54

  Review All the Key Topics 54

  Complete Tables and Lists from Memory 54

  Define Key Terms 55

  Review Questions 55

Chapter 3 Identifying Network Components 59

Foundation Topics 60

Media 60

  Coaxial Cable 60

  Twisted-Pair Cable 62

  Shielded Twisted Pair 62

  Unshielded Twisted Pair 63

  Plenum Versus Non-Plenum Cable 66

  Fiber-Optic Cable 66

  Multimode Fiber 67

  Single-Mode Fiber 68

  Cable Distribution 70

  Wireless Technologies 73

Network Infrastructure Devices 74

  Hubs 74

  Bridges 75

  Switches 77

  Multilayer Switches 83

  Routers 84

  Infrastructure Device Summary 85

Specialized Network Devices 86

  VPN Concentrators 86

     Firewalls 87

  DNS Servers 88

  DHCP Servers 90

  Proxy Servers 92

  Content Engines 93

  Content Switches 94

Virtual Network Devices 95

  Virtual Servers 95

  Virtual Switches 96

  Virtual Desktops 97

  Other Virtualization Solutions 98

Voice over IP Protocols and Components 99

Summary 101

Exam Preparation Tasks 102

  Review All the Key Topics 102

  Complete Tables and Lists from Memory 103

  Define Key Terms 103

  Review Questions 104

Chapter 4 Understanding Ethernet 107

Foundation Topics 108

Principles of Ethernet 108

  Ethernet Origins 108

  Carrier Sense Multiple Access Collision Detect 110

  Distance and Speed Limitations 113

    Ethernet Switch Features 116

  Virtual LANs 116

  Trunks 118

  Spanning Tree Protocol 119

  Corruption of a Switch’s MAC Address Table 119

  Broadcast Storms 120

  STP Operation 122

  Link Aggregation 124

  Power over Ethernet 126

  Port Monitoring 127

  User Authentication 129

  First-Hop Redundancy 130

  Other Switch Features 131

Summary 132

Exam Preparation Tasks 133

  Review All the Key Topics 133

  Complete Tables and Lists from Memory 133

  Define Key Terms 134

  Review Questions 134

Chapter 5 Working with IP Addresses 139

Foundation Topics 140

Binary Numbering 140

  Principles of Binary Numbering 140

  Converting a Binary Number to a Decimal Number 141

  Converting a Decimal Number to a Binary Number 141

  Binary Numbering Practice 143

  Binary Conversion Exercise #1 143

  Binary Conversion Exercise #1: Solution 144

  Binary Conversion Exercise #2 144

  Binary Conversion Exercise #2: Solution 144

  Binary Conversion Exercise #3 145

  Binary Conversion Exercise #3: Solution 145

  Binary Conversion Exercise #4 146

  Binary Conversion Exercise #4: Solution 146

IPv4 Addressing 147

  IPv4 Address Structure 147

  Classes of Addresses 149

  Types of Addresses 151

  Unicast 151

  Broadcast 152

  Multicast 152

Assigning IPv4 Addresses 153

  IP Addressing Components 154

  Static Configuration 154

  Dynamic Configuration 159

  BOOTP 159

  DHCP 160

  Automatic Private IP Addressing 161

Subnetting 162

  Purpose of Subnetting 162

  Subnet Mask Notation 163

  Subnet Notation: Practice Exercise #1 165

  Subnet Notation: Practice Exercise #1 Solution 165

  Subnet Notation: Practice Exercise #2 165

  Subnet Notation: Practice Exercise #2 Solution 165

  Extending a Classful Mask 166

  Borrowed Bits 166

  Calculating the Number of Created Subnets 166

  Calculating the Number of Available Hosts 167

  Basic Subnetting Practice: Exercise #1 167

  Basic Subnetting Practice: Exercise #1 Solution 168

  Basic Subnetting Practice: Exercise #2 169

  Basic Subnetting Practice: Exercise #2 Solution 169

  Calculating New IP Address Ranges 170

  Advanced Subnetting Practice: Exercise #1 172

  Advanced Subnetting Practice: Exercise #1 Solution 172

  Advanced Subnetting Practice: Exercise #2 173

  Advanced Subnetting Practice: Exercise #2 Solution 174

  Additional Practice 176

  Classless Inter-Domain Routing 177

IP Version 6 178

  Need for IPv6 178

  IPv6 Address Structure 178

  IPv6 Data Flows 179

  Unicast 179

  Multicast 180

  Anycast 181

Summary 182

Exam Preparation Tasks 183

  Review All the Key Topics 183

  Complete Tables and Lists from Memory 184

  Define Key Terms 184

  Review Questions 184

Chapter 6 Routing Traffic 189

Foundation Topics 190

Basic Routing Processes 190

Sources of Routing Information 193

  Directly Connected Routes 193

  Static Routes 194

  Dynamic Routing Protocols 195

Routing Protocol Characteristics 197

  Believability of a Route 198

  Metrics 198

  Interior Versus Exterior Gateway Protocols 199

  Route Advertisement Method 200

  Distance Vector 200

  Link State 202

Routing Protocol Examples 202

Address Translation 204

  NAT 204

  PAT 206

Multicast Routing 208

  IGMP 208

  PIM 210

  PIM-DM 211

  PIM-SM 213

Summary 215

Exam Preparation Tasks 216

  Review All the Key Topics 216

  Complete Tables and Lists from Memory 216

  Define Key Terms 216

  Review Questions 217

Chapter 7 Introducing Wide-Area Networks 221

Foundation Topics 222

WAN Properties 222

  WAN Connection Types 222

  WAN Data Rates 224

  WAN Media Types 225

  Physical Media 225

  Wireless Media 226

WAN Technologies 227

  Dedicated Leased Line 228

  T1 228

  E1 229

  T3 229

  E3 229

  CSU/DSU 230

  Point-to-Point Protocol 230

  Digital Subscriber Line 234

  Cable Modem 236

  Synchronous Optical Network 237

  Satellite 239

  Plain Old Telephone Service 241

  Integrated Services Digital Network 243

  Frame Relay 245

  Asynchronous Transfer Mode 246

  Multiprotocol Label Switching 249

Summary 250

Exam Preparation Tasks 251

  Review All the Key Topics 251

  Complete Tables and Lists from Memory 251

Define Key Terms 252

Review Questions 252

Chapter 8 Connecting Wirelessly 257

Foundation Topics 258

Introducing Wireless LANs 258

  WLAN Concepts and Components 258

  Wireless Routers 258

  Wireless Access Point 259

  Antennas 260

  Frequencies and Channels 262

  CSMA/CA 265

  Transmission Methods 265

  WLAN Standards 266

  802.11a 266

  802.11b 267

  802.11g 267

  802.11n 267

Deploying Wireless LANs 268

  Types of WLANs 268

  IBSS 269

  BSS 269

  ESS 270

  Sources of Interference 271

  Wireless AP Placement 272

Securing Wireless LANs 273

  Security Issues 273

  Approaches to WLAN Security 275

  Security Standards 277

  WEP 277

  WPA 278

  WPA2 278

    Summary 278

Exam Preparation Tasks 279

  Review All the Key Topics 279

  Complete Tables and Lists from Memory 280

  Define Key Terms 280

  Review Questions 280

Chapter 9 Optimizing Network Performance 285

Foundation Topics 286

High Availability 286

  High-Availability Measurement 286

  Fault-Tolerant Network Design 286

  Hardware Redundancy 288

  Layer 3 Redundancy 288

  Design Considerations for High-Availability Networks 290

  High-Availability Best Practices 290

  Content Caching 291

  Load Balancing 291

QoS Technologies 292

  Introduction to QoS 292

  QoS Configuration Steps 294

  QoS Components 295

  QoS Mechanisms 296

  Classification 296

  Marking 297

  Congestion Management 298

  Congestion Avoidance 298

  Policing and Shaping 299

  Link Efficiency 301

Case Study: SOHO Network Design 302

  Case Study Scenario 302

  Suggested Solution 304

  IP Addressing 304

  Layer 1 Media 305

  Layer 2 Devices 306

  Layer 3 Devices 307

  Wireless Design 307

  Environmental Factors 308

  Cost Savings Versus Performance 308

  Topology 309

Summary 309

Exam Preparation Tasks 310

  Review All the Key Topics 310

  Complete Tables and Lists from Memory 310

  Define Key Terms 311

  Review Questions 311

Chapter 10 Using Command-Line Utilities 315

Foundation Topics 316

Windows Commands 316

  arp 316

  ipconfig 318

  nbtstat 321

  netstat 324

  nslookup 326

  ping 328

  route 330

  tracert 334

UNIX Commands 336

  arp 337

  dig and nslookup 340

  host 341

  ifconfig 341

  traceroute 342

  netstat 343

  ping 345

Summary 348

Exam Preparation Tasks 349

  Review All the Key Topics 349

  Complete Tables and Lists from Memory 350

  Define Key Terms 350

  Review Questions 350

Chapter 11 Managing a Network 357

Foundation Topics 358

Maintenance Tools 358

  Bit-Error Rate Tester 358

  Butt Set 359

  Cable Certifier 359

  Cable Tester 360

  Connectivity Software 360

  Crimper 360

  Electrostatic Discharge Wrist Strap 361

  Environmental Monitor 362

  Loopback Plug 362

  Multimeter 363

  Protocol Analyzer 364

  Punch-Down Tool 365

  Throughput Tester 365

  Time Domain Reflectometer/Optical Time Domain Reflectometer 366

  Toner Probe 366

Configuration Management 367

Monitoring Resources and Reports 369

  SNMP 369

  Syslog 373

  Logs 375

  Application Logs 376

  Security Logs 376

  System Logs 377

Summary 378

Exam Preparation Tasks 379

  Review All the Key Topics 379

  Complete Tables and Lists from Memory 379

  Define Key Terms 380

  Review Questions 380

Chapter 12 Securing a Network 385

Foundation Topics 386

Security Fundamentals 386

  Network Security Goals 386

  Confidentiality 386

  Integrity 390

  Availability 391

  Categories of Network Attacks 391

  Confidentiality Attacks 391

  Integrity Attacks 394

  Availability Attacks 397

Defending Against Attacks 402

  User Training 402

  Patching 402

  Security Policies 403

  Governing Policy 404

  Technical Policies 405

  End User Policies 405

  More Detailed Documents 405

  Incident Response 406

  Vulnerability Scanners 407

  Nessus 407

  Nmap 408

  Honey Pots and Honey Nets 409

  Access Control Lists 410

Remote Access Security 411

Firewalls 413

  Firewall Types 413

  Firewall Inspection Types 414

  Packet-Filtering Firewall 414

  Stateful Firewall 415

  Firewall Zones 416

Virtual Private Networks 417

  Overview of IPsec 419

  IKE Modes and Phases 420

  Authentication Header and Encapsulating Security Payload 422

  The Five Steps in Setting Up and Tearing Down an IPsec Site-to-Site VPN 423

  Other VPN Technologies 425

Intrusion Detection and Prevention 425

  IDS Versus IPS 426

  IDS and IPS Device Categories 427

  Detection Methods 427

  Deploying Network-Based and Host-Based Solutions 428

Summary 430

Exam Preparation Tasks 431

  Review All the Key Topics 431

  Complete Tables and Lists from Memory 432

 Define Key Terms 432

  Review Questions 432

Chapter 13 Troubleshooting Network Issues 437

Foundation Topics 438

Troubleshooting Basics 438

  Troubleshooting Fundamentals 438

  Structured Troubleshooting Methodology 440

Physical Layer Troubleshooting 443

  Physical Layer Troubleshooting: Scenario 444

  Physical Layer Troubleshooting: Solution 445

Data Link Layer Troubleshooting 445

  Data Link Layer Troubleshooting: Scenario 446

  Data Link Layer Troubleshooting: Solution 447

Network Layer Troubleshooting 447

  Layer 3 Data Structures 448

  Common Layer 3 Troubleshooting Issues 449

  Network Layer Troubleshooting: Scenario 451

  Network Layer Troubleshooting: Solution 451

Wireless Troubleshooting 452

  Wireless Network Troubleshooting: Scenario 454

  Wireless Network Troubleshooting: Solution 455

Summary 455

Exam Preparation Tasks 456

  Review All the Key Topics 456

  Complete Tables and Lists from Memory 456

  Define Key Terms 456

  Review Questions 457

Chapter 14 Final Preparation 461

Tools for Final Preparation 461

Pearson Cert Practice Test Engine and Questions on the DVD 461

  Install the Software from the DVD 462

  Activate and Download the Practice Exam 463

  Activating Other Exams 463

  Premium Edition 463

Video Training on DVD 464

Memory Tables 464

End-of-Chapter Review Tools 465

Suggested Plan for Final Review and Study 465

Summary 467

APPENDIX A Answers to Review Questions 469

APPENDIX B CompTIA Network+ N10-005 Exam Updates, Version 1.0 473

Glossary 475

APPENDIX C Memory Tables (DVD Only) 3

APPENDIX D Memory Table Answer Key (DVD Only) 3

TOC, 9780789748218, 10/19/2011