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

Using the CLI

Once you make a connection to the Cisco IOS, and node configurations where found in the startup-configuration file, you are automatically taken to setup mode. Since you made the decision of manually configuring the Cisco device by typing (no) when prompted, you need to understand the prompts and modes you will be navigating to configure the device. Let's create a table so you can identify the prompts and modes you need to know for your certification and real-world use.

This table lists the most common prompts and modes you will be faced with:

Prompt

Mode

Brief definition

>

User mode

Basic commands, very low privileges

#

Privilege mode

Administrative privileges, you can delete IOS

(config)#

Global configuration mode

Commands that effect the router as a whole

(config-if)#

Interface configuration mode

IP addresses,...