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Table of Contents Cover Acknowledgments About the Author Introduction Cisco’s Network Certifications What Does This Book Cover? What’s Available Online? How to Use This Book Where Do You Take the Exams? CCENTExam Objectives Assessment Test Answers to Assessment Test Chapter 1: Internetworking Internetworking Basics Internetworking Models The OSI Reference Model Summary Exam Essentials Written Labs Review Questions Chapter 2: Ethernet Networking and Data Encapsulation Ethernet Networks in Review Ethernet Cabling Data Encapsulation The Cisco Three-Layer Hierarchical Model Summary Exam Essentials Written Labs Review Questions Chapter 3: Introduction to TCP/IP Introducing TCP/IP TCP/IP and the DoD Model IP Addressing IPv4 Address Types Summary Exam Essentials Written Labs Review Questions Chapter 4: Easy Subnetting Subnetting Basics Summary Exam Essentials Written Labs Review Questions Chapter 5: VLSMs, Summarization, and Troubleshooting TCP/IP Variable Length Subnet Masks (VLSMs) Summarization Troubleshooting IP Addressing Summary Exam Essentials Written Lab Review Questions Chapter 6: Cisco’s Internetworking Operating System (IOS) The IOS User Interface Command-Line Interface (CLI) Administrative Configurations Router and Switch Interfaces Viewing, Saving, and Erasing Configurations Summary Exam Essentials Written Lab Hands-on Labs Review Questions Chapter 7: Managing a Cisco Internetwork The Internal Components of a Cisco Router and Switch Backing Up and Restoring the Cisco Configuration Configuring DHCP Network Time Protocol (NTP) Using Cisco Discovery Protocol (CDP) Using Telnet Resolving Hostnames Checking Network Connectivity and Troubleshooting Summary Exam Essentials Written Lab Hands-on Labs Review Questions Chapter 8: IP Routing Routing Basics The IP Routing Process Configuring IP Routing Configuring IP Routing in Our Network Dynamic Routing Routing Information Protocol (RIP) Summary Exam Essentials Written Lab Hands-on Labs Review Questions Chapter 9: Open Shortest Path First (OSPF) Open Shortest Path First (OSPF) Basics Configuring OSPF OSPF and Loopback Interfaces Verifying OSPF Configuration Summary Exam Essentials Written Lab Hands-on Labs Review Questions Chapter 10: Layer Switching Switching Services Configuring Catalyst Switches Summary Exam Essentials Written Lab 10 Hands-on Labs Review Questions Chapter 11: VLANs and InterVLAN Routing VLAN Basics Identifying VLANs Routing between VLANs Configuring VLANs Summary Exam Essentials Written Lab 11 Hands-on Labs Review Questions Chapter 12: Security Perimeter, Firewall, and Internal Routers Introduction to Access Lists Standard Access Lists Extended Access Lists Monitoring Access Lists Summary Exam Essentials Written Lab 12 Hands-on Labs Review Questions Chapter 13: Network Address Translation (NAT) When Do We Use NAT? Types of Network Address Translation NAT Names How NAT Works Testing and Troubleshooting NAT Summary Exam Essentials Written Lab 13 Hands-on Labs Review Questions Chapter 14: Internet Protocol Version (IPv6) Why Do We Need IPv6? The Benefits and Uses of IPv6 IPv6 Addressing and Expressions How IPv6 Works in an Internetwork IPv6 Routing Protocols Configuring IPv6 on Our Internetwork Configuring Routing on Our Internetwork Summary Exam Essentials Written Labs Hands-on Labs Review Questions Appendix A: Answers to Written Labs Chapter 1: Internetworking Chapter 2: Ethernet Networking and Data Encapsulation Chapter 3: Introduction to TCP/IP Chapter 4: Easy Subnetting Chapter 5: VLSMs, Summarization and Troubleshooting TCP/IP Chapter 6: Cisco’s Internetworking Operating System (IOS) Chapter 7: Managing a Cisco Internetwork Chapter 8: IP Routing Chapter 9: Open Shortest Path First (OSPF) Chapter 10: Layer Switching Chapter 11: VLANs and InterVLAN Routing Chapter 12: Security Chapter 13: Network Address Translation Chapter 14: Internet Protocol Version (IPv6) Appendix B: Answers to Review Questions Chapter 1: Internetworking Chapter 2: Ethernet Networking and Data Encapsulation Chapter 3: Introduction to TCP/IP Chapter 4: Easy Subnetting Chapter 5: VLSMs, Summarization, and Troubleshooting TCP/IP Chapter 6: Cisco’s Internetworking Operating System (IOS) Chapter 7: Managing a Cisco Internetwork Chapter 8: IP Routing Chapter 9: Open Shortest Path First (OSPF) Chapter 10: Layer Switching Chapter 11: VLANs and InterVLAN Routing Chapter 12: Security Chapter 13: Network Address Translation Chapter 14: Internet Protocol Version (IPv6) Appendix C: Disabling and Configuring Network Services Blocking SNMP Packets Disabling Echo Turning off BootP and Auto-Config Disabling the HTTP Interface Disabling IP Source Routing Disabling Proxy ARP Disabling Redirect Messages Disabling the Generation of ICMP Unreachable Messages Disabling Multicast Route Caching Disabling the Maintenance Operation Protocol (MOP) Turning Off the X.25 PAD Service Enabling the Nagle TCP Congestion Algorithm Logging Every Event Disabling Cisco Discovery Protocol Disabling the Default Forwarded UDP Protocols Cisco’s Auto Secure Appendix D: About the Additional Study Tools Additional Study Tools System Requirements Using the Study Tools Troubleshooting Free Online Tools ... over 60 books, including the very popular CCNA: Cisco Certified Network Associate Study Guide, CCNA Wireless Study Guide, and CCNA Data Center Study Guide, all from Sybex He runs an international... the Cisco certification climb as well as the unofficial prerequisite to each of the more advanced levels But that changed when Cisco announced the Cisco Certified Entry Network Technician (CCENT) ... popular as the ones shown You can find information on all Cisco certification tracks at www .cisco. com Cisco Certified Entry Network Technician (CCENT) Don’t be fooled by the oh-so misleading name of