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

VLANs and Inter-VLAN Routing

This chapter is extremely important, not just because I said so, but because VLANs are crucial to your network's efficiency. I may sound somewhat repetitive, but you need to remember that switches break up collision domains, which is great, meaning you are in a private collision domain increasing your bandwidth. You can also configure your switch to run at full-duplex, send, and receive at the same time. Switches create MAC address tables, so they reduce the ARP broadcast.

You can create a Virtual Local Area Network (VLAN), which means you can also break up broadcast domains on your switch. When designing your VLAN network, you need to think it through carefully: How exactly am I going to create these virtual LANs? You could create a VLAN by department, by floor, or, in a school environment, by classroom; it is completely up to you.

The idea...