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

Internal components of Cisco router and switch

It's always good to be aware of the major components of your routers and switches and what they do, and how they all work together to create and maintain the network. Once you have a good understanding of this, you will become much better at your troubleshooting skills and will be able to minimize the errors.

I like to put this in the order of what components you will use more frequently:

Component

Description

RAM

Once the router decompresses the IOS into RAM, all your work will be done in RAM. This is the reason it's important to copy your configurations to NVRAM, which is your HDD of your router. RAM is responsible for holding routing table information, ARP cache, and packet buffers. The data structures of RAM allow the router to function properly. Something else to keep in mind with RAM is the amount of RAM...