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

The need for IP addressing

An Internet Protocol (IP) address is a Layer 3 logical address that is assigned to all devices on a network to allow communication between nodes on different IP networks. Imagine sending a letter to a friend or relative using traditional postal services. After writing the letter, you’ll need to include the sender’s address if the recipient wants to reply to your letter. Additionally, as the author of the letter, you’ll need to include the destination mailing address to ensure the courier service has all the details needed to deliver the letter to the right address and person. What if you forgot to include the source/sender address on the letter? The recipient will not be able to send any replies to you. What if you haven’t included the destination mailing address? The courier service will not be able to deliver the letter to the appropriate person.

Based on this analogy, the letter (message) is the electrical signal being generated...