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)

Common issues on wired networks

In this section, we will address some of the most common connectivity and performance issues that transpire on wired networks. As most of these issues exist at layer 1 and layer 2, higher-layer protocols will frequently exhibit issues as well when these problems exist, since these higher-layer protocols depend on the services offered by the lower layers. It is therefore recommended that technicians become familiar with the symptoms of these issues, and perform a bottom-to-top troubleshooting methodology when they suspect that these problems are present:

  • Link lights/status indicators: Most equipment includes lights on each interface where links can be plugged into the equipment, which helps technicians to diagnose physical layer issues on those links. Lighting schemes differ between different vendors of equipment, but a lack of lights on an interface...