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Prepare for Cisco CCENT ICND1 100-101 exam success with this Cisco Exam Cram from Pearson IT Certification, a leader in IT. Cisco CCENT ICND1 100-101 Exam Cram, Second Edition is the perfect study guide to help you pass the Cisco ICND1 100-101 exam, providing coverage and practice questions for every exam topic. The book contains an extensive set of preparation tools such as exam objective mapping; a self-assessment section that helps you evaluate your motivations and exam readiness; concise, easy-to-read exam topic overviews; Exam Alerts that highlight key concepts; bullet lists and summaries for easy review; Cram Savers, Cram Quizzes, and chapter-ending practice questions that help you assess your knowledge and test your understanding; Notes that indicate areas of concern or specialty training; Tips to help you build a better foundation of knowledge; and an extensive glossary of terms and acronyms. The book also contains the extremely useful Cram Sheet tear-out that represents a collection of the most difficult-to-remember facts and numbers you should memorize before taking the test. Complementing all these study tools is the powerful Pearson IT Certification Practice Test software, complete with hundreds of exam-realistic practice questions. This assessment software offers you a wealth of customization option and reporting features, allowing you to test your knowledge in study mode, practice exam mode, or flash card mode.Covers the critical information you'll need to know to score higher on your Cisco CCENT ICND1 100-101 exam!* Identify the protocols that operate at specific OSI layers* Learn the details of custom subnetting with IPv4* Understand and implement IPv6* Connect, configure, and manage Cisco routers and switches* Set up security for routers and switches* Create VLANs and set up switch-to-switch trunk links* Configure, verify, and troubleshoot OSPFv2 and OSPFv3* Anticipate the actions a router will take* Understand and use CDP for neighbor discovery* Learn the detailed learning and forwarding process of both routers and switches* Filter traffic from one network to another with access control lists (ACLs)* Deploy Network Address Translation (NAT) and IOS router DHCP services* Troubleshoot many types of network problemsCompanion CDThe companion CD contains a digital edition of the Cram Sheet and the powerful Pearson IT Certification Practice Test engine, complete with hundreds of exam-realistic questions and two complete practice exams. The assessment engine offers you a wealth of customization options and reporting features, laying out a complete assessment of your knowledge to help you focus your study where it is needed most. Pearson IT Certification Practice Test minimum system requirements: Windows XP (SP3), Windows Vista (SP2), Windows 7, or Windows 8; Microsoft .NET Framework 4.0 Client; Pentium-class 1GHz processor (or equivalent); 512MB RAM;650MB disk space plus 50MB for each downloaded practice exam; access to the Internet to register and download your practice examsMike Valentine has been in the IT field for 16 years, focusing on network design and implementation. He is a Cisco Certified Systems Instructor (#31461) and specializes in Cisco Unified Communications instruction as well as CCNA and CCNP courses. His accessible, humorous, and effective teaching style has demystified Cisco for hundreds of students since he began teaching in 2002.Keith Barker, CCIE No. 6783 R/S & Security, is a 27-year veteran of the networking industry. He currently works at CBT Nuggets. His past experience includes EDS, Blue Cross, Paramount Pictures, and KnowledgeNET, and he has delivered CCIE-level training for several years.
Contents
Introduction . . . . . . . . . . . . . . . . . . . 1Taking a Certification Exam . . . . . . . . . . . . . . . 2Tracking Your Certification Status . . . . . . . . . . . . 3How to Prepare for an Exam . . . . . . . . . . . . . . . . 4What This Book Will Not Do . . . . . . . . . . . . . . . 5What This Book Is Designed to Do . . . . . . . . . . . . 5About This Book . . . . . . . . . . . . . . . . . . . 6CCENT Official Exam Topics . . . .. . . . . 6Chapter Formats . . . . . . . . . . . . . . . . . 12Pearson IT Certification Practice Test Engine and Questions on the CD-ROM . . . 14Install the Software from the CD . . . . . . . . .. . . . . 14Activate and Download the Practice Exam . . . . . . . . . . 15Activating Other Exams . . . . . . . . . . . . . . . 16Contacting the Authors . . . . . . . . . . . 16Self-Assessment . . . . . . . . . . . . . . . . 17CCENT in the Real World . . . . . . . . . . . . . 17The Ideal CCENT Candidate . . . . . . . . . . . . 18Put Yourself to the Test . . . . . . . . . . 19CHAPTER 1: Networking Fundamentals . . . . . . . 25Essential Terms and Components . . . .. . . . . . . . 26Topologies . . . . . . .. . . . . . . . 27Ethernet . . . . . . . . . . . . . . 28WAN Technologies . . . . . . . . . . . 31Review Questions . . . . . . . . . . . . . . . . . 34Answers to Review Questions . . . . . . . . . . 36What Next? . . . . . . . . . . . . . . 37CHAPTER 2: Network Models . . . . . . . . 39Cisco Hierarchical Design . . . .. . . . . . . . . . . 40Access Layer . . . . . . . . . . . . . . . . . 40Distribution Layer . . . . . . . . . . . . . 41Core Layer . . . . . . . . . . . . . . . . . 41Advantages of the Three-Layer Model . . .. . . . . 42OSI Model . . . . . . . . . . . . . . . . 44Layer 7: The Application Layer . . . . . . . . . 45Layer 6: The Presentation Layer . . . . . . . . . 47Layer 5: The Session Layer . . .. . . . . . . . 47Layer 4: The Transport Layer . . . . . . . . 47Layer 3: The Network Layer . . . .. . . . . . . 54Layer 2: The Data Link Layer . . . . . . . . . . . 56Layer 1: The Physical Layer . . . . . . . . . . . . . 57TCP/IP Model . . . . . .. . . . . . . 61Review Questions . . . . . . . . . .. . . . . . . 64Answers to Review Questions . . . . . . . . . . . . . 67CHAPTER 3: Concepts in IP Addressing . . . . . . . 69Binary . . . . . . . . . . .. . . . . 70Hexadecimal . . . . . . . .. . . . . . . . 74Conversion Between Binary, Hex, and Decimal . . . . . . 75Decimal to Hexadecimal Conversions . . . . . . . . 75Hexadecimal to Decimal Conversions . . . .. . . . . 75IP Address Components . . . . . . . . . . . . . 77Address Class . . . . . . . . . . . . . . 77Public and Private IP Addresses . . . . . . . . . 78Default Subnet Mask . . . . . . . . . . . 78The Network Field . . . . . . .. . . . . . . 79The Host Field . . . . . . . . . . . . . . . . 80Nondefault Masks . . . . . . . . . . . . . 80The Subnet Field . . . . . . . . .. . . . . . 81Subnetting . . . . . . . . . . . . . . . . . . . . . 82Address Class and Default Mask . . . . . . . . . . . . . 83The Increment . . . . . . . . . . . . . . . . . . . 84Number of Hosts . . . . . . . . .. . . . . . 86The Broadcast ID . . . . . . . . . . . . . 88Number of Subnets . . . . . . . . .. . . . . . . 89Working with Subnetting Questions . . . . . . . 91The Subnetting Chart . . . . . . . . . . . 93VLSM . . . . . . . . . . . . . . . . . . . . 96Route Summarization . . . . . . . . . . . . . . . . 100Summarization Guidelines . . . . . .. . . . . 102Determining Summary Addresses . . . . . . . 104IPv6 . . . . . . . . . . . .. . . . . . . . . 110IPv6 Address Allocation . . . . . . . . . . . . . . . 112IPv6 Address Notation . . . . . . . . . . . . 113Types of IPv6 Addresses . . . . . . . . . . 114IPv6 Address Configuration . . . . .. . . . 115IPv6 Router Configuration . . . . . .. . . . . 116IPv6 Features . . . . . . . . . . . . . . . 117The IPv6 Header . . . . . . . .. . . . 118IPv6 Transition Strategies . . . . . . . . . . 119Review Questions . . . . . . . . . . . .. . . 122Answers to Review Questions . . . . . . . . . 128What Next? . . . . . . . . . . . . .. . . . 131CHAPTER 4: Working with Cisco Equipment. . . . . . . 133Introducing Your Cisco Gear . . . . . . . . . . . . 134External Connections . . . . . .. . . . . . . . 135Other Connections . . . . . . . . . . . . . . . . 139Connecting and Configuring Cisco Devices . . . . . . . . 141Device Memory Locations . . . . . . . . . 142IOS Startup Process . . . . . . .. . . . . 142Setup Mode . . . . . . . . . . . . . . 144Configuration Register . . . . .. . . . . 144Password Recovery . . . . . . . . . . . 145Command-Line Modes . . . . .. . . . . 146Command Shortcuts . . . . . . . . . . . . . 148Context-Sensitive Help . . . . . . . . . 149Managing IOS Licensing . . . . . . . . . . . 150Remote Management . . . . . . . . . . . . . . 152Telnet . . . . . . . . . . . . . . . . . 152Secure Shell . . . . . . . . . . . . . 154Cisco Discovery Protocol . . . . . . . . . . . . . . 155Internet Control Message Protocol . . . . . . 156Network Time Protocol . . . . . . . . . . . 158Simple Network Management Protocol. . . . .. . . 158Syslog . . . . . . . . . . . . . . . . 159NetFlow . . . . . . . . . . . . . . 159Basic Switch Configuration . . . . . . . . . . 159Basic Router Configuration . . . . . . . . . 160Review Questions . . . . . . . .. . . . . . . 164Answers to Review Questions . . . . . . . . . . . . . . . 166What Next? . . . . . . . . . . . . . . . . . . . . 167CHAPTER 5: Securing Your Cisco Devices . . . . .. . . . . . 169Securing Routers and Switches . . . . . .. . . . . . . . . . 170Configuring Password Security . . . . . . . .. . . . 170Configuring SSH Access to Your Router . . . . . . . . . . 174External Authentication Methods . . . . . . . . . . . . . 176Switch Port Security . . . . . . . . . . .. . . . . . . . 178Security Best Practices for Switches . . . . .. . . . . 178Review Questions . . . . . . . . . . . . . . . . . . . . 184Answers to Review Questions . . . . .. . . . . . . . . 186What Next? . . . . . . . . . . . . . . . . . . . . . . . 187CHAPTER 6: Basic Switch Operations and Configuration . . . . . . 189Bridging and Switching . . . . . . . . . . .. . . . . . . . 190Functions of Bridges and Switches . . . . . . . . . . 191The Differences Between Switches and Bridges . . . . . . . 195STP . . . . . . . . . . . . . . .. . . . . . 200VLAN Concepts and Applications . . . . . . . . . . . . 204The Definition of a VLAN . . . . . . . . . 206Benefits of VLANs . . . . . . . .. . . . . . . . 206Implementing VLANs . . . . . . . . . . 208VLAN Membership . . . . . . . . . . . . 210Trunking . . . . . . . . . . . . . . . . . . . . . 212802.1Q . . . . . . . . . . . . . . . . . . 214Configuring Switches for Trunking . . . . . . . . . . 215Review Questions . . . . . . . . . . . . . . . . 219Answers to Review Questions . . . . . . . . . . . . . 222What Next? . . . . . . . . . . . . . . . . . 224CHAPTER 7: Basic Routing . . . . . . 225Routing Fundamentals . . . . . . . . . . . . . . 226The Next Hop Concept . . . . . . . . . . 227Connected Networks . . . . . . . . . . . . 228Static Routes . . . . . . . . . . . . . . . 229Default Routes . . . . . . . . . . . . . . 230Dynamic Routes . . . . . . . . . . 232Understanding the Router Lookup Process and the IP Route Table . . .. . 235Inter-VLAN Routing . . . . . . . . . . 242Router on a Stick . . . . . . . . . 243L3 Switching . . . . . . . . . . . 245OSPF . . . . . . . . . . . . . . . . . . . 248Characteristics . . . . . .. . . . . . . . 249Configuring Single-Area OSPFv2. . . . . . . . 254Configuring Single-Area OSPFv3. . . . . . . . . . . 258Verifying and Troubleshooting OSPF. . . . . . . . 260Verification of OSPFv3 . . . . . . . . . . . 261Review Questions . . . . . . . . . . .. . . . . . 265Answers to Review Questions . . . .. . . . . . 269CHAPTER 8: Visualizing Data Flow Between Two Hosts on a Network . . . 271Host-to-Host Direct Communications . . . . . . . . . 272Host to Host Through a Switch . . . . . . . . . . . 275Host to Host Through a Router . . . . . . . . . . 278Review Questions . . . . . . . . . . . . . . . . . . . 283Answers to Review Questions . . . . . . . . . . . . . 286What Next? . . . . . . . . . . . . . . 288CHAPTER 9: IP Access Lists . . . . . . . 289IP Access Lists as Packet Filters . . . . . . . . . . . . . 290Types of ACLs . . . . . . . . . . . . . . . 293Configuring and Implementing . . . . . . . . . . . . . . 296Configuring Standard ACLs . . . . . . . . . . 297Configuring Extended ACLs . . . . . . . . . . . 300Filtering Telnet and SSH Access . . . . . . . . . . 302Troubleshooting and Verifying ACL Configurations. . . . .. . . . 308Review Questions . . . . . . . . . . . . . 311Answers to Review Questions . . . . . . . . . . . . . 316What Next? . . . . . . . . . . . . . . 318CHAPTER 10: IP Services . . . . . 319Network Address Translation . . .. . . . . . . . 320NAT Terminology . . . . . . . . . . 321Applications, Advantages, and Disadvantages of NAT . . . . . . . . . 323Static NAT . . . . . . . . . . . . . . . . . . . 324Dynamic NAT . . . . .. . . . . . . . . . . 326PAT . . . . . . . . . . . . . . . . . 328Verification and Troubleshooting NAT and PAT . . . . . 330Network Time Protocol . . . . . . . . . . . 334Configuring an IOS Router as an NTP Client . . . . . . . 335Verification of NTP . . . . .. . . . . . . . 336DHCP . . . . . . . . .. . . . . . . . . 338Configuring an IOS Router as a DHCP Client . . . . . . 338Configuring an IOS Router as a DHCP Server . . .. . . . 339Verification of DHCP Operation . . . . . . . . 340Review Questions . . . . . . .. . . . . . . . . . 343Answers to Review Questions . . . . . . . . . . . . 345CHAPTER 11: Troubleshooting . . . . 347Troubleshoot Layer 1 Problems . . .. . . . . . . . . . . 348Problems with the Wiring . . . . .. . . . . . . 348Duplex . . . . . . . . . . . . . . . . . . 349Finding the Errors . . . . . . .. . . . . . 349Verify and Troubleshoot VLANs and Port Membership . . . .. . . . 353Troubleshooting VLANs . . . . .. . . . . . 354Verify Trunk Configuration and Operation . . . .. . . . . . 357Is the Link Up and Configured? . . . . . . . . . . 357VLANs Must Exist for the Trunk to Support Them . . . . . . 357Administrative Versus Operational . . . . . . . . . 358Troubleshoot Problems with IP Addressing and Host Configurations . . 361Verify Hosts Have Correct IP Addresses . . . . . . . . . . 362How to Remotely Change a Cisco IP Address . . . . . . . . 362Making Sure That We Have a Default Gateway on Hosts . . . . . . 362Troubleshooting NAT . . . . . . . .. . . . . . . . . 363Troubleshoot ACL Issues . . . . . . . . . . . . 365Review Questions . . . . . . . . . . . . . . . . . . . 368Answers to Review Questions . . . . . . . . . . . . 375Practice Exam 1 . . . . . . . . . . . . . . . . 377Answer Key to Practice Exam 1 . . . . . . . . . . . . 413Answers at a Glance to Practice Exam 1 . . . . . . . . . 413Answers with Explanations . . . . . . . .. . . . . 413Practice Exam 2 . . . . . . . . . . . . .. . . . . 423 Answer Key to Practice Exam 2 . . . . . . . . . . . . . . . 459Answers at a Glance to Practice Exam 2 . . . . . . . . . . . 459Answers with Explanations . . . . . . . . . . . . 460Glossary . . . . . . . . . . . 469 Index . . . . . . . . . . . . . . . . . 487
