Interconnecting Cisco Network Devices, Part 1 (ICND1): CCNA Exam 640-802 and ICND1 Exam 640-822

Cover......Page 1
Contents......Page 11
Foreword......Page 23
Introduction......Page 24
 Exploring the Functions of Networking......Page 28
  What Is a Network?......Page 29
  Common Physical Components of a Network......Page 30
  Interpreting a Network Diagram......Page 31
  Resource-Sharing Functions and Benefits......Page 32
  Network User Applications......Page 34
  The Impact of User Applications on the Network......Page 35
  Characteristics of a Network......Page 36
  Physical Versus Logical Topologies......Page 37
  Bus Topology......Page 39
  Star and Extended-Star Topologies......Page 40
  Ring Topologies......Page 42
  Mesh and Partial-Mesh Topologies......Page 43
  Connection to the Internet......Page 45
  Summary of Exploring the Functions of Networking......Page 46
  Need for Network Security......Page 47
  Balancing Network Security Requirements......Page 50
  Adversaries, Hacker Motivations, and Classes of Attack......Page 51
  Mitigating Common Threats......Page 53
 Understanding the Host-to-Host Communications Model......Page 56
  OSI Reference Model......Page 57
  Data Communications Process......Page 61
  Peer-to-Peer Communication......Page 64
  The TCP/IP Protocol Stack......Page 65
  OSI Model Versus TCP/IP Stack......Page 66
  Summary of Understanding the Host-to-Host Communications Model......Page 67
 Understanding TCP/IP's Internet Layer......Page 68
 IP Network Addressing......Page 69
  IP Address Classes......Page 71
  Network and Broadcast Addresses......Page 74
  Public and Private IP Addresses......Page 78
  Address Exhaustion......Page 79
  Domain Name System......Page 83
  Using Common Host Tools to Determine the IP Address of a Host......Page 84
  Summary of TCP/IP's Internet Layer......Page 87
  The Transport Layer......Page 88
  Transport Layer Functionality......Page 92
  Summary of Understanding TCP/IP's Transport and Application Layers......Page 108
  Layer 1 Devices and Their Functions......Page 109
  Layer 2 Devices and Their Functions......Page 110
  Layer 3 Addressing......Page 111
  Mapping Layer 2 Addressing to Layer 3 Addressing......Page 112
  ARP Table......Page 113
  Host-to-Host Packet Delivery......Page 114
  Function of the Default Gateway......Page 123
  Using Common Host Tools to Determine the Path Between Two Hosts Across a Network......Page 124
  Summary of Exploring the Packet Delivery Process......Page 128
  The Definition of a LAN......Page 129
  Components of a LAN......Page 130
  Functions of a LAN......Page 131
  How Big Is a LAN?......Page 132
  Ethernet LAN Standards......Page 133
  The Role of CSMA/CD in Ethernet......Page 134
  Ethernet Frames......Page 136
  Ethernet Frame Addressing......Page 137
  MAC Addresses and Binary-Hexadecimal Numbers......Page 138
  Summary of Understanding Ethernet......Page 139
  Ethernet Network Interface Cards......Page 140
  Connection Media......Page 141
  Unshielded Twisted-Pair Cable......Page 143
  UTP Implementation......Page 144
 Chapter Summary......Page 149
 Review Questions......Page 150
 Understanding the Challenges of Shared LANs......Page 164
  Ethernet LAN Segments......Page 165
  Collisions......Page 166
  Collision Domains......Page 167
  Layer 2 Addressing......Page 169
  Host-to-Host Packet Delivery......Page 170
  Summary of Exploring the Packet Delivery Process......Page 175
  Cisco IOS Software Features and Functions......Page 176
  Configuring Network Devices......Page 177
  External Configuration Sources......Page 178
  Cisco IOS Command-Line Interface Functions......Page 179
  Entering the EXEC Modes......Page 180
  Keyboard Help in the CLI......Page 181
  Enhanced Editing Commands......Page 184
  Command History......Page 185
  Summary of Operating Cisco IOS Software......Page 187
  Physical Startup of the Catalyst Switch......Page 188
  Switch LED Indicators......Page 189
  Viewing Initial Bootup Output from the Switch......Page 191
  Logging In to the Switch......Page 193
  Configuring a Switch from the Command Line......Page 194
  Showing the Switch Initial Startup Status......Page 195
  MAC Address Table Management......Page 198
 Understanding Switch Security......Page 199
  Configuring Password Security......Page 200
  Configuring the Login Banner......Page 202
  Port Security Configuration......Page 203
  Microsegmentation......Page 207
  Duplex Communication......Page 208
  Physical Redundancy in an Ethernet LAN......Page 212
  Loop Resolution with Spanning Tree Protocol (STP)......Page 215
 Troubleshooting Switch Issues......Page 216
  Identifying and Resolving Media Issues......Page 217
  Summary of Troubleshooting Switch Issues......Page 219
 Review Questions......Page 220
  The Business Case for WLAN Service......Page 232
  Differences Between WLANs and LANs......Page 234
  Organizations That Standardize WLANs......Page 235
  ITU-R Local FCC Wireless......Page 236
  802.11 Standards Comparison......Page 238
  Wi-Fi Certification......Page 239
  Wireless LAN Security Threats......Page 240
  Mitigating Security Threats......Page 241
  Evolution of Wireless LAN Security......Page 242
  Wireless Client Association......Page 243
  How 802.1x Works on WLANs......Page 244
  WPA and WPA2 Modes......Page 245
 Implementing a WLAN......Page 246
  802.11 Topology Building Blocks......Page 247
  BSA Wireless Topology......Page 248
  Wireless Topology Data Rates......Page 249
  Access Point Configuration......Page 251
  Wireless Clients......Page 252
  Wireless Troubleshooting......Page 253
  Summary of Implementing a WLAN......Page 254
 Review Questions......Page 255
 Chapter Objectives......Page 262
  Routers......Page 263
  Path Determination......Page 264
  Routing Tables......Page 265
  Dynamic Routing Protocols......Page 267
 Understanding Binary Numbering......Page 271
  Decimal and Binary Systems......Page 272
  Powers of 2......Page 274
  Decimal-to-Binary Conversion......Page 275
  Binary-to-Decimal Conversion......Page 276
  Subnetworks......Page 277
  Computing Usable Subnetworks and Hosts......Page 280
  How End Systems Use Subnet Masks......Page 283
  How Routers Use Subnet Masks......Page 284
  Mechanics of Subnet Mask Operation......Page 286
  Applying Subnet Mask Operation......Page 288
  Determining the Network Addressing Scheme......Page 289
  Class C Example......Page 290
  Class B Example......Page 292
  Class A Example......Page 293
  Summary of Constructing a Network Addressing Scheme......Page 295
  Initial Startup of a Cisco Router......Page 296
  Initial Setup of a Cisco Router......Page 297
  Logging In to the Cisco Router......Page 304
  Showing the Router Initial Startup Status......Page 307
  Cisco Router Configuration Modes......Page 308
  Configuring a Cisco Router from the CLI......Page 310
  Configuring Cisco Router Interfaces......Page 312
  Configuring the Cisco Router IP Address......Page 313
  Verifying the Interface Configuration......Page 314
  Summary of Configuring a Cisco Router......Page 319
  Host-to-Host Packet Delivery......Page 320
  Using the show ip arp Command......Page 327
  Using Common Cisco IOS Tools......Page 329
 Understanding Cisco Router Security......Page 330
  Configuring Password Security......Page 331
  Telnet and SSH Access......Page 332
  Summary of Understanding Cisco Router Security......Page 333
  Cisco SDM Overview......Page 334
  Configuring Your Router to Support Cisco SDM......Page 336
  Configuration Overview......Page 339
  Cisco SDM Wizards......Page 341
 Using a Cisco Router as a DHCP Server......Page 342
  Understanding DHCP......Page 343
  Using Cisco SDM to Enable the DHCP Server Function......Page 344
  Monitoring DHCP Server Functions......Page 346
  Establishing a Telnet or SSH Connection......Page 348
  Suspending and Resuming a Telnet Session......Page 350
  Closing a Telnet Session......Page 351
  Alternate Connectivity Tests......Page 352
 Chapter Summary......Page 354
 Review Questions......Page 355
 Chapter Objectives......Page 370
  What Is a WAN?......Page 371
  How Is a WAN Different from a LAN?......Page 373
  WAN Devices......Page 375
  WAN Cabling......Page 376
  The Role of Routers in WANs......Page 378
  WAN Data Link Layer Protocols......Page 379
  WAN Communication Link Options......Page 380
 Enabling the Internet Connection......Page 381
  Packet-Switched Communication Links......Page 382
  Digital Subscriber Line......Page 383
  Cable......Page 385
  Global Internet: The Largest WAN......Page 386
  Obtaining an Interface Address from a DHCP Server......Page 387
  Introducing NAT and PAT......Page 388
  Translating Inside Source Addresses......Page 390
  Configuring the DHCP Client and PAT......Page 393
  Verifying the DHCP Client Configuration......Page 397
  Summary of Enabling the Internet Connection......Page 398
  Routing Overview......Page 399
  Static Route Configuration......Page 401
  Default Route Forwarding Configuration......Page 403
  Static Route Configuration Verification......Page 404
 Configuring Serial Encapsulation......Page 405
  Circuit-Switched Communication Links......Page 406
  Public Switched Telephone Network......Page 407
  Point-to-Point Communication Links......Page 408
  Configuring HDLC Encapsulation......Page 411
  Point-to-Point Protocol......Page 412
  Serial Encapsulation Configuration Verification......Page 415
  Frame Relay......Page 416
  ATM and Cell Switching......Page 417
 Enabling RIP......Page 419
  Dynamic Routing Protocol Overview......Page 420
  Classful Routing Versus Classless Routing Protocols......Page 423
  Distance Vector Route Selection......Page 424
  RIP Features......Page 426
  RIPv1 and RIPv2 Comparison......Page 427
  RIP Configuration......Page 428
  RIP Configuration Verification......Page 429
  Summary of Enabling RIP......Page 432
 Chapter Summary......Page 433
 Review Questions......Page 434
  Cisco Discovery Protocol......Page 450
  Information Obtained with CDP......Page 451
  Using the show cdp neighbors Command......Page 453
  Monitoring and Maintaining Cisco Discovery Protocol......Page 455
  Creating a Network Map of the Environment......Page 457
  Stages of the Router Power-On Boot Sequence......Page 458
  Internal Router Components......Page 459
  How a Device Locates and Loads Cisco IOS Image and Configuration Files......Page 462
  Configuration Register......Page 464
 Managing Cisco Devices......Page 467
  Cisco IOS File System and Devices......Page 468
  Managing Cisco IOS Images......Page 470
  Managing Device Configuration Files......Page 473
  Cisco IOS copy Command......Page 474
  Using show and debug Commands on Cisco Devices......Page 477
 Chapter Summary......Page 480
 Review Questions......Page 481
 Chapter 1......Page 490
 Chapter 2......Page 493
 Chapter 3......Page 496
 Chapter 4......Page 497
 Chapter 5......Page 500
 Chapter 6......Page 503
 B......Page 505
 C......Page 506
 E......Page 508
 I......Page 509
 M......Page 510
 P......Page 511
 R......Page 512
 S......Page 513
 T......Page 514
 W-X-Y-Z......Page 515