Introduction 1

Book I: Overview 5

Chapter 1: Looking at the Cisco Network World 7

Chapter 2: Exploring Cisco Network Design 23

Chapter 3: Knowing as Little as Possible about Math 47

Chapter 4: Testing Your Core Networking Knowledge 59

Chapter 5: Getting into the Cisco Internetwork Operating System 95

Book II: Internet Protocols 131

Chapter 1: Making the Most of IPv4 133

Chapter 2: Choosing between Protocols: TCP and UDP 159

Chapter 3: Working with ARP, the IP Communication Model, and Data Link Layer Troubleshooting 177

Chapter 4: Preparing for the Advent of IPv6 203

Book III: Switching 211

Chapter 1: Reviewing the Enterprise LAN 213

Chapter 2: Switching Basics 225

Chapter 3: Confi guring Switches 237

Chapter 4: Easing Device Discovery with CDP 265

Chapter 5: Virtualizing Networks with VLANs and VTP 277

Chapter 6: Adding Fault Tolerance with STP 295

Chapter 7: Adding Fault Tolerance with EtherChannel 315

Chapter 8: Speeding Confi guration with Smartport Macros 327

Book IV: Routing 337

Chapter 1: Making the Wide Area Network (WAN) Wide 339

Chapter 2: Cozying Up to Routing Basics 351

Chapter 3: Router Confi guration 365

Chapter 4: Setting Up Static Routes 385

Chapter 5: Confi guring Serial Connections and WAN Links 395

Chapter 6: Meeting the Routing Protocols 407

Chapter 7: Checking Out RIP and EIGRP Characteristics and Design 419

Chapter 8: Getting Comfortable with the OSPF and IS-IS Protocols 433

Chapter 9: Routing with BGP and IP Multicast 451

Book V: Wireless 471

Chapter 1: Getting Wise to Wireless LANs473

Chapter 2: Planning Your WLAN 491

Chapter 3: Securing Your WLAN 519

Chapter 4: Building a Cisco Wireless Network 535

Book VI: Security 555

Chapter 1: Defending against Common Attacks with Basic Security Tools 557

Chapter 2: Securing Networks with Cisco's Adaptive Security Appliance 579

Chapter 3: Securing Networks with ACLs and NAT 611

Chapter 4: Cisco Security Best Practices 633

Index 655