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

Common network issues

Many issues network professionals encounter while troubleshooting networks are limited to particular client devices. In these cases, network professionals notice that all of the other clients on the network are operating correctly while the client in question exhibits issues. Here, network professionals should examine the network configuration on the client machine itself, paying particular attention to the possibility of the following:

  • IP address duplication: In many networks with poor documentation practices, IP addresses may be reused on multiple clients, resulting in duplicate IPs on the network and poor/non-existent connectivity for the clients. For this reason, many professionals will ping the IP address they intend to use before configuring the IP address on a machine to check whether any other hosts are utilizing the intended address. However, many firewalls filter the Internet Control Message Protocol (ICMP) messages used by the ping tool, resulting...