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

Broadcast control

Controlling broadcasts in your network is one of your top priorities, so by using switches, that uses private collision domains with full-duplex and that allows us to transmit and receive at the same time. You now know we can create VLANs that break up the broadcast domain into smaller logical segments.

We must still be wary of broadcasts on our network, or each VLAN. If you place too many nodes on one VLAN, that segment could get overwhelmed, so you must constantly monitor you network/VLANs to make sure that traffic is still flowing efficiently.

One thing IT personnel overlook is protocols—every protocol creates some type of broadcast. It depends on three basic things:

  • The type of protocol
  • The application running on the network
  • How the services are being used

So, it is not just creating VLANs and forgetting about it; we could be our own worst enemy...