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Table of Contents
Introduction xxx
Assessment Test lxvi
Chapter 1 Introduction to Networks 1
First Things First: What’s a Network? 2
Physical Network Topologies 11
Topology Selection, Backbones, and Segments 19
Summary 21
Exam Essentials 22
Written Lab 22
Review Questions 23
Chapter 2 The Open Systems Interconnection Specifications 27
Internetworking Models 28
The OSI Reference Model 30
Introduction to Encapsulation 45
Modulation Techniques 46
Summary 47
Exam Essentials 48
Written Lab 48
Review Questions 50
Chapter 3 Networking Topologies, Connectors, and Wiring Standards 55
Physical Media 57
Cable Properties 73
Wiring Standards 75
Installing Wiring Distributions 82
Summary 84
Exam Essentials 85
Written Lab 85
Review Questions 87
Chapter 4 The Current Ethernet Specifications 91
Network Basics 92
Ethernet Basics 94
Ethernet at the Data Link Layer 99
Ethernet at the Physical Layer 106
Ethernet over Other Standards (IEEE 1905.1-2013) 111
Summary 114
Exam Essentials 115
Written Lab 115
Review Questions 120
Chapter 5 Networking Devices 125
Common Network Connectivity Devices 128
Other Specialized Devices 146
Planning and Implementing a Basic SOHO Network Using Network Segmentation 159
Summary 169
Exam Essentials 169
Written Lab 170
Review Questions 171
Chapter 6 Introduction to the Internet Protocol 175
Introducing TCP/IP 177
Data Encapsulation 198
Summary 202
Exam Essentials 202
Written Lab 203
Review Questions 204
Chapter 7 IP Addressing 209
IP Terminology 210
The Hierarchical IP Addressing Scheme 211
IPv4 Address Types 218
Internet Protocol Version 6 (IPv6) 220
Summary 230
Exam Essentials 230
Written Labs 231
Review Questions 233
Chapter 8 IP Subnetting, Troubleshooting IP, and Introduction to NAT 237
Subnetting Basics 238
Troubleshooting IP Addressing 260
Introduction to Network Address Translation (NAT) 268
Summary 272
Exam Essentials 272
Written Lab 273
Review Questions 274
Chapter 9 Introduction to IP Routing 279
Routing Basics 280
The IP Routing Process 283
Testing Your IP Routing Understanding 289
Static and Dynamic Routing 291
Summary 294
Exam Essentials 294
Written Lab 294
Review Questions 296
Chapter 10 Routing Protocols 301
Routing Protocol Basics 302
Distance Vector Routing Protocols 306
Link State Routing Protocols 315
High Availability 319
Advanced IPv6 Concepts 326
IPv6 Routing Protocols 332
Summary 334
Exam Essentials 334
Written Lab 335
Review Questions 336
Chapter 11 Switching and Virtual LANs 341
Networking Before Layer 2 Switching 343
Switching Services 346
Spanning Tree Protocol 354
Virtual LANs 358
VLAN Trunking Protocol 367
Two Additional Advanced Features of Switches 376
Summary 380
Exam Essentials 381
Written Lab 381
Review Questions 383
Chapter 12 Wireless Networking 387
Introduction to Wireless Technology 390
Cellular 393
The 802.11 Standards 393
Comparing 802.11 Standards 399
Wireless Network Components 401
Installing a Wireless Network 405
Site Survey 418
Wireless Security 422
Summary 433
Exam Essentials 433
Written Lab 434
Review Questions 435
Chapter 13 Authentication and Access Control 439
Security Filtering 441
Managing User Account and Password Security 458
User-Authentication Methods 468
Summary 476
Exam Essentials 477
Written Lab 477
Review Questions 479
Chapter 14 Network Threats and Mitigation 483
Recognizing Security Threats 485
Vulnerabilities 500
Understanding Mitigation Techniques 512
Policies and Procedures 516
Anti-malware Software 532
Summary 537
Exam Essentials 537
Written Lab 537
Review Questions 539
Chapter 15 Physical Security and Risk 543
Using Hardware and Software Security Devices 545
Defining Firewalls 547
Firewall Technologies 548
Firewalls at the Application Layer vs. the Network Layer 558
Scanning Services and Other Firewall Features 561
Intrusion Detection and Prevention Systems 566
VPN Concentrators 571
Understanding Problems Affecting Device Security 572
Summary 586
Exam Essentials 587
Written Lab 588
Review Questions 589
Chapter 16 Wide Area Networks 593
What’s a WAN? 596
T-Series Connections 601
Transmission Media 603
Broadband Services 607
Wireless WAN Technologies 611
WAN Protocols 613
WAN Troubleshooting 623
Summary 629
Exam Essentials 630
Written Lab 631
Review Questions 632
Chapter 17 Troubleshooting Tools 635
Protocol Analyzers 637
Throughput Testers 638
Connectivity Software 639
Using traceroute 640
Using the ping Utility 647
Using the Address Resolution Protocol 650
Using the nslookup Utility 654
Resolving Names with the Hosts Table 656
Using the Mtr Command (pathping) 657
Using the route Command 659
Using the nbtstat Utility 663
Using the netstat Utility 669
Using tcpdump 676
Using the File Transfer Protocol 677
Using the Telnet Utility 682
Summary 684
Exam Essentials 684
Written Lab 685
Review Questions 686
Chapter 18 Software and Hardware Tools 691
Understanding Network Scanners 693
Baseline 702
Network Monitoring and Logging 703
Identifying Hardware Tools 712
Summary 725
Exam Essentials 725
Written Lab 726
Review Questions 727
Chapter 19 Network Troubleshooting 731
Narrowing Down the Problem 734
Troubleshooting Steps 749
Troubleshooting Tips 770
Summary 773
Exam Essentials 774
Written Lab 774
Review Questions 776
Chapter 20 Management, Monitoring, and Optimization 781
Managing Network Documentation 785
Network Monitoring 795
Network Optimization 808
Summary 834
Exam Essentials 835
Written Lab 836
Review Questions 837
Appendix A Answers to Written Labs 841
Chapter 1: Introduction to Networks 842
Chapter 2: The Open Systems Interconnection Specifications 842
Chapter 3: Networking Topologies, Connectors, and Wiring Standards 843
Chapter 4: The Current Ethernet Specifications 843
Chapter 5: Networking Devices 845
Chapter 6: Introduction to the Internet Protocol 846
Chapter 7: IP Addressing 847
Chapter 8: IP Subnetting, Troubleshooting IP, and Introduction to NAT 848
Chapter 9: Introduction to IP Routing 849
Chapter 10: Routing Protocols 849
Chapter 11: Switching and Virtual LANs 850
Chapter 12: Wireless Networking 850
Chapter 13: Authentication and Access Control 850
Chapter 14: Network Threats and Mitigation 851
Chapter 15: Physical Security and Risk 851
Chapter 16: Wide Area Networks 852
Chapter 17: Troubleshooting Tools 852
Chapter 18: Software and Hardware Tools 853
Chapter 19: Network Troubleshooting 853
Chapter 20: Management, Monitoring, and Optimization 854
Appendix B Answers to Review Questions 855
Chapter 1: Introduction to Networks 856
Chapter 2: The Open Systems Interconnection Specifications 857
Chapter 3: Networking Topologies, Connectors, and Wiring Standards 859
Chapter 4: The Current Ethernet Specifications 860
Chapter 5: Networking Devices 861
Chapter 6: Introduction to the Internet Protocol 863
Chapter 7: IP Addressing 864
Chapter 8: IP Subnetting, Troubleshooting IP, and Introduction to NAT 866
Chapter 9: Introduction to IP Routing 868
Chapter 10: Routing Protocols 869
Chapter 11: Switching and Virtual LANs 871
Chapter 12: Wireless Networking 872
Chapter 13: Authentication and Access Control 874
Chapter 14: Network Threats and Mitigation 875
Chapter 15: Physical Security and Risk 877
Chapter 16: Wide Area Networks 878
Chapter 17: Troubleshooting Tools 880
Chapter 18: Software and Hardware Tools 881
Chapter 19: Network Troubleshooting 883
Chapter 20: Management, Monitoring, and Optimization 885
Appendix C Subnetting Class A 887
Subnetting Practice Examples: Class A Addresses 888
Subnetting in Your Head: Class A Addresses 890
Written Lab 1 891
Written Lab 2 892
Answers to Written Lab 1 892
Answers to Written Lab 2 893
Index 895
