CompTIA Network+™ Certification All-In-One Exam Guide, 8th Edition (Exam N10-008) PDF by Mike Meyers and Scott Jernigan

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CompTIA Network+™ Certification All-In-One Exam Guide, Eighth Edition (Exam N10-008)

By Mike Meyers and Scott Jernigan

CompTIA Network+™ Certification All-In-One Exam Guide, Eighth Edition

Contents:

Acknowledgments . ………………………………………………………………. xxiii

Introduction . ……………………………………………………………………… xxv

Chapter 1 Network Models . ………………………………………………………………………. 1

Historical/Conceptual . …………………………………………………………. 2

Working with Models . …………………………………………………… 2

Biography of a Model . ………………………………………………………… 2

Network Models . ……………………………………………………………….. 3

The OSI Seven-Layer Model on a Simple Network . ……………. 4

Welcome to MHTechEd! . …………………………………………….. 5

Test Specific . ……………………………………………………………….. 6

Let’s Get Physical—Network Hardware and Layers 1–2 . . . . 6

Beyond the Single Wire—Network Software

and Layers 3–7 . 21

The OSI Seven-Layer Model and Remote Work . 35

Chapter Review . 39

Questions . 39

Answers . 40

Chapter 2 Cabling and Topology .

Test Specific . 4434

Network Topologies . 44

Bus and Ring . 44

Star . 46

Hybrid . 47

Mesh . 48

Parameters of a Topology . 49

Cabling and Connectors . 50

Copper Cabling and Connectors . 50

Fiber-Optic Cabling and Connectors . . . . . . . . . . . . . . . . . . . 59

Fire Ratings . 63

Networking Industry Standards—IEEE . 63

Chapter Review . 65

Questions . 65

Answers . 66

Chapter 3 Ethernet Basics . ………………………………………………………………………………. 67

Historical/Conceptual . 68

Ethernet . 68

802.3 Standards . 68

Test Specific . 69

Ethernet Frames . 69

Early Ethernet Standards . 71

Bus Ethernet . 71

10BASE-T . 72

10BASE-FL . 76

CSMA/CD . 79

Enhancing and Extending Ethernet Networks . 81

The Trouble with Hubs . 81

Switches to the Rescue . 81

Connecting Ethernet Segments . 84

Troubleshooting Switches . 87

Chapter Review . 87

Questions . 87

Answers . 89

Chapter 4 Ethernet Standards .

Test Specific . ……………………………………………………………………… 9911

100-Megabit Ethernet . …………………………………………………………. 91

100BASE-T . ………………………………………………………………………. 92

100BASE-FX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

100BASE-SX . …………………………………………………………………….. 95

Full-Duplex Ethernet . ………………………………………………………….. 95

Gigabit Ethernet . ………………………………………………………………… 97

1000BASE-SX . …………………………………………………………………… 97

1000BASE-LX . …………………………………………………………………. 98

SFF Fiber Connectors . ………………………………………………………… 98

Mechanical Connection Variations . ………………………………………. 99

Implementing Multiple Types of Gigabit Ethernet . …………………… 99

Ethernet Evolutions . …………………………………………………………… 100

10 Gigabit Ethernet . 100

Chapter Review . 107

Questions . 107

Answers . 109

Chapter 5 Installing a Physical Network .

Historical/Conceptual . 111113

Understanding Structured Cabling . 113

Cable Basics—A Star Is Born . 114

Test Specific . ……………………………………………………………………… 115

Structured Cable—Network Components . ……………………………… 115

Structured Cable—Beyond the Star . ………………………………………. 130

Installing Structured Cabling . ………………………………………………. 134

Getting a Floor Plan . ………………………………………………….. 134

Mapping the Runs . ……………………………………………………… 135

Determining the Location of the

Telecommunications Room . 136

Pulling Cable . 137

Making Connections . 141

Testing the Cable Runs . 148

NICs . 157

Buying NICs . 158

Link Lights . 160

Diagnostics and Repair of Physical Cabling . 162

Diagnosing Physical Problems . 162

Check Your Lights . 162

Check the NIC . 163

Cable Testing . 164

Problems in the Telecommunications Room . 165

Toners . 166

Chapter Review . 168

Questions . 168

Answers . 170

Chapter 6 TCP/IP Basics .

Historical/Conceptual . 117712

Test Specific . 172

The TCP/IP Protocol Suite . 172

Network Layer Protocols . 173

Transport Layer Protocols . 174

Application Layer Protocols . 176

IP and Ethernet . 177

IP Addresses . 181

IP Addresses in Action . 188

Class IDs . 197

CIDR and Subnetting . 199

Subnetting . 199

CIDR: Key Takeaways . 209

IP Address Assignment . 209

Static IP Addressing . 210

Dynamic IP Addressing . 214

Special IP Addresses . 227

Chapter Review . 228

Questions . 228

Answers . 229

Chapter 7 Routing .

Historical/Conceptual . 223312

How Routers Work . 232

Test Specific . 234

Routing Tables . 234

Freedom from Layer 2 . 243

Network Address Translation . 244

Dynamic Routing . 250

Routing Metrics . 251

Distance Vector and Path Vector . 253

Link State . 260

EIGRP . 261

Dynamic Routing Makes the Internet . 262

Route Redistribution and Administrative Distance . 262

Working with Routers . 263

Connecting to Routers . 263

Basic Router Configuration . 271

Router Problems . 273

Chapter Review . 277

Questions . 277

Answers . 279

Chapter 8 TCP/IP Applications .

Historical/Conceptual . 228812

Transport Layer and Network Layer Protocols . 282

How People Communicate . 282

Test Specific . 283

TCP . 283

UDP . 284

ICMP . 286

IGMP . 288

The Power of Port Numbers . 288

Registered Ports . 291

Connection Status . 294

Rules for Determining Good vs. Bad Communications . 296

Common TCP/IP Applications . 297

Telnet and SSH . 297

E-mail . 299

SQL . 304

FTP . 305

HTTP and HTTPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

TCP/IP Applications Chart . 311

Beyond Network+ . 312

Other Layer 7 Applications . 312

Chapter Review . 314

Questions . 314

Answers . 315

Chapter 9 Network Naming .

Historical/Conceptual . 331178

Before DNS . 318

NetBIOS . 318

hosts . 320

Test Specific . 321

DNS . 321

How DNS Works . 321

Administering DNS Servers . 333

Troubleshooting DNS on Clients . 343

Diagnosing TCP/IP Network Issues . 347

Chapter Review . 350

Questions . 350

Answers . 351

Chapter 10 Securing TCP/IP .

Historical/Conceptual . 335534

Making TCP/IP Secure . 354

Encryption . 354

Integrity . 361

Nonrepudiation . 365

Test Specific . 370

Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370

Authorization . 371

TCP/IP Security Standards . 372

User Authentication Standards . 373

Encryption Standards . 380

Combining Authentication and Encryption . 385

Secure TCP/IP Applications . 387

HTTPS . 387

Securing E-Mail Protocols . 388

SCP . 389

SFTP . 389

SNMP . 390

LDAP . 391

NTP . 391

Chapter Review . 391

Questions . 391

Answers . 393

Chapter 11 Switch Features . ………………………………………………………………………………. 395

Test Specific . 396

Switch Management . 396

Access Management . 397

Port Configuration . 398

Port Security . 399

Virtual LANs . 400

Trunking . 401

Configuring a VLAN-Capable Switch . 402

Assigning VLANs and Tagging . 405

VLAN Trunking Protocol . 406

Inter-VLAN Routing . 407

DHCP and VLANs . 408

Voice VLANs . 409

Private VLANs . 409

Troubleshooting VLANs . 409

Multilayer Switches . 409

Load Balancing . 410

QoS and Traffic Shaping . 413

Port Bonding . 414

Network Protection . 414

Chapter Review . 421

Questions . 421

Answers . 423

Chapter 12 IPv6 .

Test Specific . 442256

IPv6 Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426

IPv6 Addresses . 426

Neighbor Discovery . 432

IPv6 Implementations . 434

Stateless Address Autoconfiguration (SLAAC) . 434

Aggregation . 438

IPv6 and DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 441

Moving to IPv6 . 442

IPv4 and IPv6 . 442

Transition Mechanisms . 444

Chapter Review . 446

Questions . 446

Answers . 448

Chapter 13 WAN Connectivity .

Historical/Conceptual . 444590

WAN Technologies . 450

SONET . 451

Test Specific . ……………………………………………………………………… 451

Fiber Improvements . 451

Private WANs . 452

Last-Mile Technologies . 456

DSL . 456

Broadband Cable . 459

Satellite . 460

Fiber . 461

Cellular WAN . 461

Which Connection? . 465

Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 466

Remote Terminal . 466

Virtual Private Networks . 470

WAN Troubleshooting Scenarios . 477

Loss of Internet Connectivity . 477

Interface Errors . 477

DNS Issues . 478

Interference . 478

Chapter Review . 480

Questions . 480

Answers . 481

Chapter 14 Wireless Networking .

Historical/Conceptual . 448833

Test Specific . 484

Wi-Fi Standards . 484

802.11 . 485

802.11b . 493

802.11a . 494

802.11g . 494

802.11n . 495

802.11ac . 496

802.11ax . 496

WPS . 497

Wi-Fi Security . 497

Enterprise Wireless . 505

Implementing Wi-Fi . 509

Performing a Site Survey . 509

Installing the Client . 513

Setting Up an Ad Hoc Network . 514

Setting Up an Infrastructure Network . 515

Extending the Network . 527

Verifying the Installation . 528

Troubleshooting Wi-Fi . 528

No Connection . 528

Slow Connection . 532

Weird Connection . 535

Chapter Review . 537

Questions . 537

Answers . 539

Chapter 15 Virtualization and Cloud Computing .

Test Specific . 554412

Virtualization and Cloud Computing Concepts . 542

Virtualization . 542

Cloud Computing . 548

Infrastructure as Code . 554

Virtual Networking . 556

Putting Network Virtualization and Cloud Computing to Work . . . 563

Setting Up Rocket.Chat in a Local Hypervisor . 564

Managing Cloud Resources . 569

Setting Up Rocket.Chat on IaaS . 571

Desktop as a Service . 574

Interconnecting Local and Cloud Resources . 576

Chapter Review . 578

Questions . 578

Answers . 580

Chapter 16 Data Centers .

Test Specific . 558812

Classic Data Center Architecture and Design . 582

Tiers . 583

Traffic Flows . 585

Data Storage . 587

Where Is the Classic Data Center? . 589

The Modern Data Center . 589

Virtualization . 589

Software-Defined Networking . 590

Spine and Leaf . 590

High Availability in the Data Center . 591

Load Balancing . 591

Redundancy . 592

Facilities and Infrastructure Support . 593

Documenting the Data Center . 594

Network Diagrams . 595

Baseline Configurations . 600

Assessments . 600

Chapter Review . 602

Questions . 602

Answers . 604

Chapter 17 Integrating Network Devices .

Test Specific . 660057

Internet of Things . 607

IoT Home Automation . 607

IoT Home Security . 609

IoT Communications Technologies . 610

Hardening IoT Devices . 612

Unified Communication . 613

It Started with VoIP . 613

Unified Communication Features . 614

VTC and Medianets . 617

UCaaS . 618

ICS . 619

DCS . 620

PLC . 623

SCADA . 623

Chapter Review . 625

Questions . 625

Answers . 627

Chapter 18 Network Operations .

Test Specific . 662299

Risk Management . 629

Hardening and Security Policies . 630

Change Management . 634

Patching and Updates . 636

Training . 638

Common Agreements . 639

Security Preparedness . 640

Contingency Planning . 645

Incident Response . 645

Disaster Recovery . 646

Business Continuity . 647

Forensics . 648

Chapter Review . 651

Questions . 651

Answers . 653

Chapter 19 Protecting Your Network . ………………………………………………………………. 655

Test Specific . 655

Security Concepts . 655

CIA . 656

Zero Trust . 657

Defense in Depth . 657

Separation of Duties . 658

Network Threats . 658

Threat Terminology . 659

Spoofing . 660

Packet/Protocol Abuse . 660

Zero-Day Attacks . 661

Rogue Devices . 662

ARP Cache Poisoning . 662

Denial of Service . 666

On-Path Attack . 668

Session Hijacking . 669

Password Attacks . 669

Physical/Local Access . 669

Malware . 672

Social Engineering . 674

Common Vulnerabilities . 677

Unnecessary Running Services . 677

Unpatched/Legacy Systems . 679

Unencrypted Channels . 679

Cleartext Credentials . 679

RF Emanation . 680

Hardening Your Network . 680

Physical Security . 680

Network Security . 685

Device Hardening . 692

Host Security . 693

Firewalls . 697

Types of Firewalls . 697

Implementing and Configuring Firewalls . 699

Troubleshooting Firewalls . 702

Chapter Review . 703

Questions . 703

Answers . 705

Chapter 20 Network Monitoring .

Test Specific . ……………………………………………………………………… 770078

SNMP . …………………………………………………………………………….. 708

Monitoring Tools . 712

Packet Sniffers . 713

Protocol Analyzers . 713

Sensors . 718

Interface Monitors . 719

Performance Monitors . 720

Putting It All Together . 722

Scenario: Monitoring and Managing . 722

SIEM . 726

Chapter Review . 727

Questions . 727

Answers . 729

Chapter 21 Network Troubleshooting .

Test Specific . ……………………………………………………………………… 773312

Troubleshooting Tools . …………………………………………………………. 732

Hardware Tools . …………………………………………………………………. 732

Software Tools . …………………………………………………………………… 738

The Troubleshooting Process . ………………………………………………… 750

Identify the Problem . ………………………………………………….. 751

Establish a Theory of Probable Cause . …………………………… 753

Test the Theory to Determine the Cause . ……………………….. 754

Establish a Plan of Action and Identify Potential Effects . . . . 754

Implement the Solution or Escalate as Necessary . …………….. 755

Verify Full System Functionality and Implement Preventive Measures . ………………………………………………. 756

Document Findings, Actions, Outcomes, and Lessons Learned . 756

Resolving Common Network Service Issues . 757

“We Can’t Access Our Web Server in Istanbul!” . 757

Network Troubleshooting Considerations . 759

Hands-On Problems . 760

Nearby Problems . 763

Far-flung Problems . 769

Network Performance Issues . 772

Troubleshooting Is Fun! . 773

Chapter Review . 773

Questions . 773

Answers . 775

Appendix A Exam Objective Map . 777

Appendix B Create Your Study Plan . 799

Review Your Overall Score . 799

Review Your Score by CompTIA Network+ Exam Domain . 800

Appendix C About the Online Content . 801

System Requirements . 801

Your Total Seminars Training Hub Account . 801

Privacy Notice . 802

Single User License Terms and Conditions . 802

TotalTester Online . 803

Pre-Assessment . 803

Create Your Study Plan . 804

Playing the CompTIA Network+ Introduction Video . 804

Mike’s CompTIA Network+ Video Training Sample . 804

TotalSims Sample for CompTIA Network+ . 804

Mike’s Cool Tools . 804

Technical Support . 804

Glossary . 805

Index . ………………………………………………………………………………. 893

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