In the IPv4 network addresses section of, Chapter 2, Communication in Computer Networks, it is said that the total number of IPv4 addresses is 232 = 4,294,967,296. Comparing that with the world population, it is obvious that nearly 3 billion IP addresses are missing if a single IPv4 address is assigned to every person on the planet. That was a sign that the Internet Engineering Task Force (IETF) should do something to overcome the problem of exhaustion of the IPv4 address space. In light of that, the Request for Comment (RFC) 1918 document was created, which precisely specified the IP address ranges for private use. That enabled the birth of the Network Address Translator (NAT). As the name suggests, NAT translates private IPv4 addresses to public IPv4 addresses. In fact, private IP addresses as specified by the document RFC 1918 cannot be routed...
CCENT/CCNA: ICND1 100-105 Certification Guide
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CCENT/CCNA: ICND1 100-105 Certification Guide
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Overview of this book
CCENT is the entry-level certification for those looking to venture into the networking world. This guide will help you stay up-to date with your networking skills. This book starts with the basics and will take you through everything essential to pass the certification exam. It extensively covers IPv4 and IPv6 addressing, IP data networks, switching and routing, network security, and much more—all in some detail. This guide will provide real-world examples with a bunch of hands-on labs to give you immense expertise in important networking tasks, with a practical approach. Each chapter consists of practice questions to help you take up a challenge from what you have procured. This book ends with mock tests with several examples to help you confidently pass the certification. This Certification Guide consists of everything you need to know in order to pass the ICND 1 100-105 Exam, thus obtaining a CCENT certification. However, practicing with real switches and routers or a switch or router simulator will help you succeed.
Table of Contents (18 chapters)
Preface
Free Chapter
Introduction to Computer Networks
Communication in Computer Networks
Introduction to Switching
Setting Up the Switch
Introduction to Routing
Setting up the Router
Networking Services and Maintenance
Network Troubleshooting
Studying and Preparing for ICND 1 (100-105) Exam
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Appendix A: Answers to Chapter Questions
Appendix B: Cisco Device Icons
Appendix C: Numbering Systems and Conversions
Appendix D: Boolean Algebra
Appendix E: Subnetting
Appendix F: Cisco Packet Tracer
Appendix G: Graphical Network Simulator-3 (GNS3)
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