CompTIA Network+ Certification Study Guide part 1 pps

CompTIA Network+
Certification Study Guide
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CompTIA Network+ Certification
Study Guide
Exam N10-004 2E
Robert J. Shimonski
Technical Editor
Naomi Alpern
Technical Reviewer
Michael Cross
Dustin Fritz
Mohan Krishnamurthy
Scott Sweitzer
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Library of Congress Cataloging-in-Publication Data
CompTIA Network+ certification study guide / Robert J. Shimonski [et al.]. — 2nd ed.
p. cm.
Includes index.
ISBN 978-1-59749-429-8 (pbk. : alk. paper)
1. Computer networks—Examinations—Study guides. 2. Electronic data processing personnel—Certification.
I. Shimonski, Robert.
TK5105.5.C6357 2009
004.6—dc22
200902129
Printed in the United States of America
1 2 3 4 5 6 7 8 9 0
v
Contents
ABOUT THE AUTHORS xi
CHAPTER 1 Network Fundamentals 1
Introduction 1
What Is a Network? 2
Logical Networking Topologies 14
Physical Networking Models 24
Network Types 31
Summary of Exam Objectives 36
Exam Objectives Fast Track 36
Exam Objectives Frequently Asked Questions 38
Self Test 39
Self Test Quick Answer Key 44
CHAPTER 2 Network Media 45
Introduction 45
Cabling and Connectors Overview 46

Media Issues 49
Cable Testers and Troubleshooting 58
Simplex, Half-Duplex, and Full-Duplex 63
Cabling 63
Cable Management 67
LAN Technologies and Standards 69
Media Standards 71
Connectors 75
Recognizing Category 3, 5, 5e, and 6 UTP, STP, Coaxial
Cable, SMF Optics Cable, MMF Optic Cable, and Optic Cable 81
Other Media 85
Summary of Exam Objectives 87
Exam Objectives Fast Track 89
Exam Objectives Frequently Asked Questions 93
Self Test
93
Self Test Quick Answer Key
98
Contents
vi
CHAPTER 3 Network Devices 99
Introduction 99
Network Devices 99
Summary of Exam Objectives 141
Exam Objectives Fast Track 142
Exam Objectives Frequently Asked Questions 145
Self Test 146
Self Test Quick Answer Key 150
CHAPTER 4 Switching 151
Introduction 151

Understanding Switches 152
Basic Switches 154
Multilayer Switches 155
Content Switches 156
Advanced Features of a Switch 157
Summary of Exam Objectives 161
Exam Objectives Fast Track 162
Frequently Asked Questions 164
Self Test 164
Self Test Quick Answer Key 169
CHAPTER 5 Wireless Networking 171
Introduction 171
Radio Frequency and Antenna Behaviors and Characteristics 175
Wireless Network Concepts 179
Common Exploits of Wireless Networks 200
Configuring Windows Client Computers for Wireless Network
Security 216
Site Surveys 221
Summary of Exam Objectives 221
E
xam Objectives Fast Track 224
Exam Objectives Frequently Asked Questions 229
Self Test 230
Self Test Quick Answer Key 234
CHAPTER 6 The OSI Model and Networking Protocols 235
Introduction 235
The OSI Model 237
The DoD Networking Model 257
Networking Protocols 265
Summary of Exam Objectives 275

Contents vii
Exam Objectives Fast Track 276
Exam Objectives Frequently Asked Questions 279
Self Test 280
Self Test Quick Answer Key 284
CHAPTER 7 TCP/IP and Routing 285
Introduction 285
TCP/IP 286
IPv4 287
IPv6 289
Understanding IP Addressing 294
Understanding Subnetting 305
Understanding Subnet Masking 308
Strategies to Conserve Addresses 320
Private Network Addresses 322
Multicast, Broadcast, and Unicast 329
Understanding Basic IP Routing 335
Summary of Exam Objectives 346
Exam Objectives Fast Track 348
Exam Objectives Frequently Asked Questions 352
Self Test 353
Self Test Quick Answer Key 356
CHAPTER 8 Wide Area Networking 357
Introduction 357
Switching Methods 358
WAN Protocols and Properties 360
Internet Access Methods 368
Summary of Exam Objectives 374
Exam Objectives Fast Track 374
Exam

Objectives Frequently Asked Questions 375
Self
Test 377
Self Test Quick Answer Key 383
CHAPTER 9 Security Standards and Services 385
Introduction 385
Hardware and Software Security Devices 386
Security Zones 405
Network Ports, Services, and Threats 416
Network Access Security 431
Summary 466
Exam Objectives Fast Track 467
Contents
viii
Exam Objectives Frequently Asked Questions 470
Self Test 471
Self Test Quick Answer Key 475
CHAPTER 10 Network Management 477
Introduction 477
Network Management 477
Configuration Management 478
Network Monitoring 493
Summary of Exam Objectives 505
Exam Objectives Fast Track 506
Exam Objectives Frequently Asked Questions 508
Self Test 510
Self Test Quick Answer Key 518
CHAPTER 11 Network Troubleshooting Tools 519
Introduction 519
A Troubleshooting Methodology 520

The OSI Model 525
Windows Tools 529
Linux Tools 553
NetWare Tools 557
Other Network Troubleshooting Tools 558
Importance of Network Documentation 561
Summary of Exam Objectives 561
Exam Objectives Fast Track 563
Exam Objectives Frequently Asked Questions 565
Self Test 566
Self Test Quick Answer Key 571
CHAPTER 12 Network Troubleshooting Methodology 573
Introduction 573
How to Use the OSI Model in Troubleshooting 575
Troubleshooting the Physical Layer 581
Troubleshooting the Data Link Layer 591
Troubleshooting the Network Layer 598
Troubleshooting the Transport Layer 603
Troubleshooting the Session Layer 609
Troubleshooting the Presentation Layer 612
Troubleshooting the Application Layer 614
Summary of Exam Objectives 621
Exam Objectives Fast Track 622
Exam Objectives Frequently Asked Questions 625
Contents ix
Self Test 626
Self Test Quick Answer Key 637
APPENDIX A 639
The Institute of Electrical and Electronics Engineers (IEEE) 639
APPENDIX B 651

Understanding Request for Comments 651
APPENDIX C 657
Network+ Exam N10-004 657
Chapter 1: Network Fundamentals 657
Chapter 2: Network Media 666
Chapter 3: Network Devices 674
Chapter 4: Switching 681
Chapter 5: Wireless Networking 689
Chapter 6: The OSI Model and Networking Protocols 696
Chapter 7: TCP/IP and Routing 700
Chapter 8: Wide Area Networking 707
Chapter 9: Security Standards and Services 715
Chapter 10: Network Management 722
Chapter 11: Network Troubleshooting Tools 737
Chapter 12: Network Troubleshooting Methodology 746
INDEX 765