Book Image

CompTIA Network+ N10-008 Certification Guide - Second Edition

By : Glen D. Singh
Book Image

CompTIA Network+ N10-008 Certification Guide - Second Edition

By: Glen D. Singh

Overview of this book

This book helps you to easily understand core networking concepts without the need of prior industry experience or knowledge within this fi eld of study. This updated second edition of the CompTIA Network+ N10-008 Certification Guide begins by introducing you to the core fundamentals of networking technologies and concepts, before progressing to intermediate and advanced topics using a student-centric approach. You’ll explore best practices for designing and implementing a resilient and scalable network infrastructure to support modern applications and services. Additionally, you’ll learn network security concepts and technologies to effectively secure organizations from cyber attacks and threats. The book also shows you how to efficiently discover and resolve networking issues using common troubleshooting techniques. By the end of this book, you’ll have gained sufficient knowledge to efficiently design, implement, and maintain a network infrastructure as a successful network professional within the industry. You’ll also have gained knowledge of all the official CompTIA Network+ N10-008 exam objectives, networking technologies, and how to apply your skills in the real world.
Table of Contents (26 chapters)
Part 1: Networking Concepts
Part 2: Network Implementation
Part 3: Network Operations
Part 4: Network Security and Troubleshooting
Chapter 18: Practice Exam

Cable connectivity issues

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 of the OSI model, higher-layer protocols will frequently exhibit issues when these problems exist since these higher-layer protocols depend on the services offered by the lower layers. It is therefore recommended that network professionals 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, such as switches, routers, and firewalls, includes lights on each physical interface where cables can be plugged into the equipment, which helps network professionals to diagnose physical layer issues on those links. Lighting schemes differ between different equipment vendors, but a lack of lights on an interface generally corresponds to no...