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)

Basic network performance

In this section, you will get acquainted with the use of the tools that will help in assessing basic network performance.

The ping command

In the Verifying and monitoring solutions section of this chapter, the definition for the ping command is given. Therefore, besides that, it is useful to know that the ping command relies on Internet Control Message Protocol (ICMP) Echo messages to determine the following:

  • Is the remote host active or inactive?
  • Are there time delays in communicating with the host?
  • Is there packet loss in communicating with the host?

As an analogy, the ping command works a man is in a valley and is calling his friend. The voice reflected by the valley's mountains enables...