Introduction xxii
Chapter 1 Introduction to Computer Networks 2
1-1 INTRODUCTION 5
1-2 NETWORK TOPOLOGIES 7
Section 1-2 Review 11
Test Your Knowledge 12
1-3 THE OSI MODEL 12
Section 1-3 Review 14
Test Your Knowledge 15
1-4 THE ETHERNET LAN 15
IP Addressing 19
Section 1-4 Review 21
Test Your Knowledge 22
1-5 HOME NETWORKING 22
Securing the Home Network 34
IP Addressing in the Home Network 36
Section 1-5 Review 37
Test Your Knowledge 38
1-6 ASSEMBLING AN OFFICE LAN 38
Section 1-6 Review 43
Test Your Knowledge 44
1-7 TESTING AND TROUBLESHOOTING A LAN 44
Section 1-7 Review 46
Test Your Knowledge 47
Summary 48
Questions and Problems 48
Section 1-1 48
Section 1-2 49
Section 1-3 50
Section 1-4 51
Section 1-5 52
Section 1-6 54
Section 1-7 55
Certification Questions 55
Chapter 2 Physical Layer Cabling: Twisted Pair 58
2-1 INTRODUCTION 61
2-2 STRUCTURED CABLING 62
Horizontal Cabling 65
Section 2-2 Review 68
Test Your Knowledge 69
2-3 UNSHIELDED TWISTED-PAIR CABLE 69
Shielded Twisted-pair Cable 72
Section 2-3 Review 72
Test Your Knowledge 72
2-4 TERMINATING CAT6/5E/5 UTP CABLES 73
Computer Communication 74
Straight-through and Crossover Patch Cables 76
Section 2-4 Review 85
Test Your Knowledge 85
2-5 CABLE TESTING AND CERTIFICATION 86
Section 2-5 Review 90
Test Your Knowledge 90
2-6 10 Gigabit Ethernet over Copper 90
Overview 91
Alien Crosstalk 91
Signal Transmission 93
Section 2-6 Review 94
Test Your Knowledge 94
2-7 TROUBLESHOOTING CABLING SYSTEMS 94
Installation 94
Cable Stretching 95
Cable Failing to Meet Manufacturer
Specifications 95
CAT5e Cable Test Examples 96
Section 2-7 Review 103
Test Your Knowledge 104
Summary 105
Questions and Problems 105
Section 2-1 105
Section 2-3 106
Section 2-4 107
Section 2-5 109
Section 2-6 109
Certification Questions 112
Chapter 3 Physical Layer Cabling: Fiber Optics 114
3-1 INTRODUCTION 117
3-2 THE NATURE OF LIGHT 119
Graded-Index Fiber 123
Single-Mode Fibers 124
Section 3-2 Review 125
Test Your Knowledge 125
3-3 FIBER ATTENUATION AND DISPERSION 126
Attenuation 126
Dispersion 127
Dispersion Compensation 129
Section 3-3 Review 130
Test Your Knowledge 130
3-4 OPTICAL COMPONENTS 130
Intermediate Components 132
Detectors 132
Fiber Connectorization 134
Section 3-4 Review 135
Test Your Knowledge 135
3-5 OPTICAL NETWORKING 136
Defining Optical Networking 136
Building Distribution 138
Campus Distribution 141
Section 3-5 Review 144
Test Your Knowledge 145
3-6 SAFETY 145
Section 3-6 Review 146
Test Your Knowledge 146
Summary 147
Questions and Problems 147
Section 3-1 147
Section 3-2 147
Section 3-3 148
Section 3-4 148
Section 3-5 149
Section 3-6 149
Certification Questions 150
Chapter 4 Wireless Networking 152
4-1 INTRODUCTION 154
4-2 THE IEEE 802.11 WIRELESS LAN STANDARD 155
Section 4-2 Review 162
Test Your Knowledge 162
4-3 802.11 WIRELESS NETWORKING 163
Section 4-3 Review 171
Test Your Knowledge 172
4-4 Bluetooth, WiMAX, and RFID 172
Bluetooth 172
WiMAX 174
Radio Frequency Identification 175
Section 4-4 Review 179
Test Your Knowledge 179
4-5 SECURING WIRELESS LANS 179
Section 4-5 Review 182
Test Your Knowledge 182
4-6 CONFIGURING A POINT-TO-MULTIPOINT
WIRELESS LAN: A CASE STUDY 183
1. Antenna Site Survey 183
2. Establishing a Point-to-Point Wireless Link to the Home Network 184
3-4. Configuring the Multipoint Distribution/Conducting an RF Site Survey 185
5. Configuring the Remote Installations 187
Section 4-6 Review 187
Test Your Knowledge 188
Summary 189
Questions and Problems 189
Section 4-2 189
Section 4-3 190
Section 4-4 191
Section 4-5 192
Section 4-6 193
Critical Thinking 193
Certification Questions 194
Chapter 5 Interconnecting the LANs 196
5-1 INTRODUCTION 198
5-2 THE NETWORK BRIDGE 199
Section 5-2 Review 203
Test Your Knowledge 204
5-3 THE NETWORK SWITCH 204
Hub-Switch Comparison 206
Managed Switches 209
Multilayer Switches 214
Section 5-3 Review 214
Test Your Knowledge 215
5-4 THE ROUTER 215
The Router Interface: Cisco 2800 Series 216
The Router Interface-Cisco 2600 Series 217
The Router Interface-Cisco 2500 Series 218
Section 5-4 Review 220
Test Your Knowledge 220
5-5 INTERCONNECTING LANS WITH THE ROUTER 221
Gateway Address 223
Network Segments 223
Section 5-5 Review 224
Test Your Knowledge 224
5-6 CONFIGURING THE NETWORK INTERFACE-AUTO-NEGOTIATION 225
Auto-Negotiation Steps 225
Full-Duplex/Half-Duplex 226
Section 5-6 Review 228
Test Your Knowledge 228
Summary 229
Questions and Problems 229
Section 5-2 229
Section 5-3 230
Section 5-4 232
Section 5-5 232
Section 5-6 233
Critical Thinking 233
Certification Questions 234
Chapter 6 TCP/IP 236
6-1 INTRODUCTION 238
6-2 THE TCP/IP LAYERS 239
The Application Layer 240
The Transport Layer 241
The Internet Layer 245
The Network Interface Layer 248
Section 6-2 Review 248
Test Your Knowledge 249
6-3 NUMBER CONVERSION 249
Binary-to-Decimal Conversion 249
Decimal-to-Binary Conversion 251
Hexadecimal Numbers 252
Section 6-3 Review 255
Test Your Knowledge 255
6-4 IPv4 ADDRESSING 255
Private IP Addresses n hj h 258
IP Address Assignment 258
Section 6-4 Review 259
Test Your Knowledge 259
6-5 SUBNET MASKS 259
Section 6-5 Review 266
Test Your Knowledge 266
6-6 CIDR BLOCKS 267
Section 6-6 Review 269
Test Your Knowledge 270
6-7 IPV6 ADDRESSING 270
Section 6-7 Review 273
Test Your Knowledge 273
Summary 274
Questions and Problems 274
Section 6-2 274
Section 6-3 276
Section 6-4 277
Section 6-5 278
Section 6-6 280
Section 6-7 282
Critical Thinking 282
Certification Questions 283
Chapter 7 Introduction to Router Configuration 286
7-1 INTRODUCTION 288
7-2 ROUTER FUNDAMENTALS 289
Layer 3 Networks 290
Section 7-2 Review 296
Test Your Knowledge 296
7-3 THE CONSOLE PORT CONNECTION 296
Configuring the HyperTerminal
Software (Windows) 298
Configuring the Z-Term Serial
Communications Software (Mac) 300
Section 7-3 Review 302
Test Your Knowledge 302
7-4 THE ROUTER'S USER EXEC MODE (ROUTER>) 303
The User EXEC Mode 303
Router Configuration Challenge: The User
EXEC Mode 305
Section 7-4 Review 308
Test Your Knowledge 308
7-5 THE ROUTER'S PRIVILEGED EXEC MODE (ROUTER#) 308
Hostname 309
Enable Secret 310
Setting the Line Console Passwords 310
Fast Ethernet Interface Configuration 311
Serial Interface Configuration 312
Router Configuration Challenge: The
Privileged EXEC Mode 314
Section 7-5 Review 316
Test Your Knowledge 316
Summary 317
Questions and Problems 317
Section 7-1 317
Section 7-2 317
Section 7-3 320
Section 7-4 320
Section 7-5 321
Critical Thinking 322
Certification Questions 323
Chapter 8 Introduction to Switch Configuration 326
8-1 INTRODUCTION 328
8-2 Introduction to VLANs 329
Virtual LAN 329
Section 8-2 Review 330
Test Your Knowledge 330
8-3 Introduction to Switch Configuration 330
Hostname 331
Enable Secret 332
Setting the Line Console Passwords 332
Static VLAN Configuration 333
Networking Challenge-Switch Configuration 337
Section 8-3 Review 337
Test Your Knowledge 338
8-4 Spanning-Tree Protocol 338
Section 8-4 Review 339
Test Your Knowledge 340
8-5 Network Management 340
Configuring SNMP 341
Section 8-5 Review 344
Test Your Knowledge 344
8-6 Power over Ethernet 344
Section 8-6 Review 346
Test Your Knowledge 347
Summary 348
Questions and Problems 348
Section 8-2 348
Section 8-3 349
Section 8-4 350
Section 8-5 350
Section 8-6 352
Critical Thinking 353
Certification Questions 353
Chapter 9 Routing Protocols 356
9-1 INTRODUCTION 358
9-2 STATIC ROUTING 359
Gateway of Last Resort 366
Configuring Static Routes 366
Networking Challenge: Chapter 9-
Static Routes 368
Section 9-2 Review 369
Test Your Knowledge 369
9-3 DYNAMIC ROUTING PROTOCOLS 370
Section 9-3 Review 371
Test Your Knowledge 371
9-4 DISTANCE VECTOR PROTOCOLS 372
Section 9-4 Review 374
Test Your Knowledge 374
9-5 LINK STATE PROTOCOLS 375
Section 9-5 Review 378
Test Your Knowledge 378
9-6 HYBRID PROTOCOLS 378
Section 9-6 Review 379
Test Your Knowledge 379
9-7 CONFIGURING RIP and RIPv2 379
Configuring Routes with RIP 381
Configuring Routes with RIP Version 2 385
Networking Challenge-RIP V2 387
Section 9-7 Review 388
Test Your Knowledge 388
Summary 389
Questions and Problems 389
Section 9-2 389
Section 9-3 391
Section 9-4 392
Section 9-5 392
Section 9-6 393
Section 9-7 394
Critical Thinking 395
Certification Questions 395
Chapter 10 Internet Technologies: Out to the Internet 398
10-1 INTRODUCTION 401
10-2 THE LINE CONNECTION 402
Data Channels 403
Point of Presence 404
Section 10-2 Review 406
Test Your Knowledge 407
10-3 REMOTE ACCESS 407
Analog Modem Technologies 407
Cable Modems 408
xDSL Modems 408
The Remote Access Server 410
Section 10-3 Review 411
Test Your Knowledge 411
10-4 Metro Ethernet/Carrier Ethernet 412
Ethernet Service Types 413
Service Attributes 414
Section 10-4 Review 415
Test Your Knowledge 416
10-5 NETWORK SERVICES-DHCP AND DNS 416
The DHCP Data Packets 418
DHCP Deployment 419
Network Services: DNS 420
Internet Domain Name 421
Section 10-5 Review 423
Test Your Knowledge 423
10-6 INTERNET ROUTING-BGP 424
Section 10-6 Review 426
Test Your Knowledge 427
10-7 ANALYZING INTERNET DATA TRAFFIC 427
Utilization/Errors Strip Chart 428
Network Layer Matrix 429
Network Layer Host Table 430
Frame Size Distribution 430
Section 10-7 Review 431
Test Your Knowledge 432
Summary 433
Questions and Problems 433
Section 10-2 433
Section 10-3 434
Section 10-4 434
Section 10-5 435
Section 10-6 435
Certification Questions 436
Chapter 11 Troubleshooting 438
11-1 INTRODUCTION 440
11-2 ANALYZING COMPUTER NETWORKS 441
Using Wireshark to Inspect Data Packets 442
Using Wireshark to Capture Packets 444
Section 11-2 Review 446
Test Your Knowledge 446
11-3 ANALYZING COMPUTER NETWORKS-FTP DATA PACKETS 446
Section 11-3 Review 447
Test Your Knowledge 448
11-4 ANALYZING CAMPUS NETWORK DATA TRAFFIC 448
Section 11-4 Review 450
Test Your Knowledge 450
11-5 TROUBLESHOOTING THE ROUTER INTERFACE 451
Section 11-5 Review 454
Test Your Knowledge 454
11-6 TROUBLESHOOTING THE SWITCH INTERFACE 454
Section 11-6 Review 457
Test Your Knowledge 457
11-7 TROUBLESHOOTING FIBER OPTICS-The OTDR 457
Section 11-7 Review 459
Test Your Knowledge 459
Summary 460
Questions and Problems 460
Section 11-2 460
Section 11-3 461
Section 11-4 462
Section 11-5 462
Section 11-6 462
Section 11-7 463
Certification Questions 463
Chapter 12 Network Security 466
12-1 INTRODUCTION 468
12-2 INTRUSION (HOW AN ATTACKER GAINS CONTROL OF A NETWORK) 469
Social Engineering 469
Password Cracking 470
Packet Sniffing 470
Vulnerable Software 471
Viruses and Worms 473
Section 12-2 Review 474
Test Your Knowledge 474
12-3 DENIAL OF SERVICE 475
Distributed Denial-of-service Attacks 476
Section 12-3 Review 477
Test Your Knowledge 477
12-4 SECURITY SOFTWARE AND HARDWARE 477
Antivirus Software 477
Personal Firewall 478
Firewall 484
Other Security Appliances 485
Section 12-4 Review 486
Test Your Knowledge 486
12-5 INTRODUCTION TO VIRTUAL PRIVATE NETWORK 486
VPN Tunneling Protocols 487
Configuring a Remote Access VPN Server 489
Configuring a Remote Client's VPN
Connection 489
Cisco VPN Client 491
Section 12-5 Review 495
Test Your Knowledge 495
Summary 497
Questions and Problems 497
Section 12-2 497
Section 12-3 498
Section 12-4 498
Section 12-5 499
Critical Thinking 500
Certification Questions 500
Glossary of Key Terms 503
TOC, 1/31/2012, 9780789749031
