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

Lab – reassembling a SIP telephone conversation

In this hands-on lab, you will discover the security flaws found within the SIP protocol and how to assemble all the SIP packets and listen to a VoIP conversation that occurred over a network. To get started with this hands-on exercise, follow these steps:

  1. Go to and download the MagicJack+ short test call file:

Figure 6.62 – Downloading the sample file

  1. Next, open the MagicJack+ short test call sample file using Wireshark to view all the captured packets:

Figure 6.63 – SIP packet capture

  1. Next, click on Telephony | VoIP Calls on the Wireshark menu bar:

Figure 6.64 – Telephony menu

  1. Next, the VoIP Calls window will appear and display all the VoIP conversations that were found within the packet capture. You may need to press Prepare Filter before clicking on Play...