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)
1
Part 1: Networking Concepts
9
Part 2: Network Implementation
13
Part 3: Network Operations
17
Part 4: Network Security and Troubleshooting
22
Chapter 18: Practice Exam

Lab – analyzing TFTP packets

In this hands-on lab, you will explore how TFTP packets learn to reconstruct data and extract files from captured TFTP packets on a network. To get started with this exercise, follow these steps:

  1. Go to https://wiki.wireshark.org/SampleCaptures and download the tftp_rrq.pcap file, as shown here:

Figure 6.47 – TFTP packet capture file

  1. Next, open the tftp_rrq.pcap file using Wireshark to view all the packets:

Figure 6.48 – TFTP packets

As shown in the preceding screenshot, packet #1 is a Read Request message from the client to the TFTP server on the network and it’s requesting the rfc1350.txt file. Next, the file is transferred in multiple data blocks from the server at 192.168.0.10 to the client at 192.168.0.253 over the network.

  1. Within a total of 99 packets, the entire text file is transferred from the server to the client. To view the entire rfc1350...