Book Image

CompTIA Network+ Certification Guide

By : Glen D. Singh, Rishi Latchmepersad
Book Image

CompTIA Network+ Certification Guide

By: Glen D. Singh, Rishi Latchmepersad

Overview of this book

CompTIA certified professionals have always had the upper hand in the information technology industry. This book will be your ideal guide to efficiently passing and achieving this certification. Learn from industry experts and implement their practices to resolve complex IT issues. This book revolves around networking concepts where readers will learn topics like network architecture, security, network monitoring, and troubleshooting. This book will not only prepare the readers conceptually but will also help them pass the N10-007 exam. This guide will also provide practice exercise after every chapter where readers can ensure their concepts are clear. By the end of this book, readers will leverage this guide and the included practice questions to boost their confidence in appearing for the actual certificate.
Table of Contents (17 chapters)

Determining the Network ID

The subnet mask helps determine which network (subnet) an IP address belongs to. The process of determining the network or subnetwork is done by ANDing the IP address and the subnet mask together. The result will provide the Network ID. Let's take a look at the following diagram:

We would like to determine which network PC1 belongs to. To do this, we need to AND both the IP address: 192.168.1.0 against the subnet mask, which is 255.255.255.0. To proceed further, we'll convert both the IP address and subnet mask into binary and use the laws of ANDing.

The laws of ANDing

The following are the laws of ANDing:

0 AND 1 = 0
0 AND 0 = 0
1 AND 0 = 0
1 AND 1 = 1

By converting the Network ID from...