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You're reading from CCENT/CCNA: ICND1 100-105 Certification Guide Learn computer network essentials and enhance your networking skills by obtaining the CCENT certification

Product type Paperback

Published in Apr 2018

Publisher

ISBN-13 9781788621434

Length 362 pages

Edition 1st Edition

Tools

Linux

Concepts

IT Certification

Author (1):

Bekim Dauti

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Table of Contents (23) Chapters

Title Page

Dedication

Packt Upsell

Contributors

Preface

1. Introduction to Computer Networks FREE CHAPTER

2. Communication in Computer Networks

3. Introduction to Switching

4. Setting Up the Switch

5. Introduction to Routing

6. Setting up the Router

7. Networking Services and Maintenance

8. Network Troubleshooting

9. Studying and Preparing for ICND 1 (100-105) Exam

1. Appendix A: Answers to Chapter Questions

2. Appendix B: Cisco Device Icons

Cisco network topology icons

3. Appendix C: Numbering Systems and Conversions

4. Appendix D: Boolean Algebra

5. Appendix E: Subnetting

6. Appendix F: Cisco Packet Tracer

7. Appendix G: Graphical Network Simulator-3 (GNS3)

8. Other Books you may enjoy

Index

Ethernet's frame overview

In the section Ethernet communication technology, in Chapter 2,Communication in Computer Networks, you were introduced to Ethernet history, Ethernet protocols, Ethernet framework, and Ethernet MAC addresses.As a continuation of the second chapter, in the following sections, you will get to know the concepts such as the Ethernet encapsulation frame, Ethernet frame fields, and Ethernet frame processing.

Ethernet frame encapsulation

The data encapsulation in the OSI reference model (see Figure 3.20) will help you to understand Ethernet frame encapsulation. Note that while data flows from the upper layers to lower layers of the OSI reference model, header information is added. Thus, the Transport layer adds a TCP or UDP header, the Network layer adds an IP header, the Data Link layer adds an Ethernet header, and then, the data gets transmitted. Depending on the medium, the transmission takes the form of electrical, light, or wave signaling, which is expressed in bits...