Book Image

CCNA Routing and Switching 200-125 Certification Guide

By : Lazaro (Laz) Diaz
Book Image

CCNA Routing and Switching 200-125 Certification Guide

By: Lazaro (Laz) Diaz

Overview of this book

Cisco Certified Network Associate (CCNA) Routing and Switching is one of the most important qualifications for keeping your networking skills up to date. CCNA Routing and Switching 200-125 Certification Guide covers topics included in the latest CCNA exam, along with review and practice questions. This guide introduces you to the structure of IPv4 and IPv6 addresses and examines in detail the creation of IP networks and sub-networks and how to assign addresses in the network. You will then move on to understanding how to configure, verify, and troubleshoot layer 2 and layer 3 protocols. In addition to this, you will discover the functionality, configuration, and troubleshooting of DHCPv4. Combined with router and router simulation practice, this certification guide will help you cover everything you need to know in order to pass the CCNA Routing and Switching 200-125 exam. By the end of this book, you will explore security best practices, as well as get familiar with the protocols that a network administrator can use to monitor the network.
Table of Contents (24 chapters)
4
Subnetting in IPv4
21
Mock Test Questions
22
Assessments

Backing up and restoring your IOS

You should know by now that before you perform any kind of change to your internetworking devices or end devices, you need to back up your configurations and your IOS. It does not matter whether it's a hardware or a software update, especially if you're upgrading your IOS, you better be sure that you have a back up of the existing IOS and configurations.

This is IT, ladies and gentlemen: if something can go wrong, it will. So, back everything up.

With that disclaimer said, I will show how you would back up your IOS to a TFTP server:

  1. Make sure you are connected to the server:
  1. You need to know the source file name you are backing up:
  1. Start the back up process:
  1. Verify that the file was copied to the TFTP server:

For certification purposes, they want you to know three steps:

  1. Verify connectivity.
  2. Does the TFTP sever have enough...