Book Image

CCENT/CCNA: ICND1 100-105 Certification Guide

By : Bekim Dauti
Book Image

CCENT/CCNA: ICND1 100-105 Certification Guide

By: Bekim Dauti

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)
10
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Appendix G: Graphical Network Simulator-3 (GNS3)

How do computers communicate?

In the world of humans, for communication to take place between two individuals, it is required that both sides know the language that they want to communicate in. Similarly, in the world of computers, whenever two computers try to communicate, they must support the communication protocol.

To better understand the communication process between two computers, let's examine the example of communication between two individuals. When two people meet and begin to communicate, the following activities take place:

  1. Person A formulates his/her opinion in their mind and utters the words through their mouth.
  2. The air then acts as the transmission medium which transfers the words from person A to person B.
  3. The transmitted words reach the ears of person B, who then, through the center of knowledge, understands the received words.

This works in almost the...