Book Image

Wireshark Revealed: Essential Skills for IT Professionals

By : James H Baxter, Yoram Orzach, Charit Mishra
Book Image

Wireshark Revealed: Essential Skills for IT Professionals

By: James H Baxter, Yoram Orzach, Charit Mishra

Overview of this book

This Learning Path starts off installing Wireshark, before gradually taking you through your first packet capture, identifying and filtering out just the packets of interest, and saving them to a new file for later analysis. You will then discover different ways to create and use capture and display filters. By halfway through the book, you'll be mastering Wireshark features, analyzing different layers of the network protocol, and looking for any anomalies.We then start Ethernet and LAN switching, through IP, and then move on to TCP/UDP with a focus on TCP performance problems. It also focuses on WLAN security. Then, we go through application behavior issues including HTTP, mail, DNS, and other common protocols. This book finishes with a look at network forensics and how to locate security problems that might harm the network.This course provides you with highly practical content explaining Metasploit from the following books: 1) Wireshark Essentials 2) Network Analysis Using Wireshark Cookbook 3) Mastering Wireshark
Table of Contents (5 chapters)

Chapter 4. Inspecting Application Layer Protocols

This chapter will lead you through the common application layer protocols and will make it easy for you to find any anomalies. You will understand and analyze the normal behavior of application layer protocols by looking at the most common protocols and understand their usual and unusual behaviors.

  • DNS—normal and unusual
  • Lab Up—DNS
  • FTP—normal and unusual
  • Lab Up
  • HTTP—normal and unusual
  • Lab Up—HTTP
  • SMTP—normal and unusual
  • Lab Up—SMTP
  • SIP—normal and unusual
  • Lab Up—SIP
  • VoIP—normal and unusual
  • Lab Up—VoIP
  • Decrypting encrypted traffic
  • Practice questions

We will cover some of the most common application layer protocols that govern today's networks, whether small or big. Without spending too much time, let me take you on this wonderful journey of protocols.

Domain name system

Imagine a world of Internet where you have to type a random numerical value (IP address), instead...