Wireshark深度解析：网络故障诊断入门指南

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"《Mastering Wireshark》是一本深入浅出的IT专业书籍，专为网络/流量/包分析初学者设计。该书以Wireshark为核心工具，引导读者理解和解决常见的网络问题。Wireshark是一款强大的网络协议分析器，其主要功能包括但不限于捕获、监控和解析网络数据包，以揭示网络行为的深层细节。书中首先概述了TCP/IP模型，强调了模型中五个层次（应用层、传输层、网络层、数据链路层和物理层）的作用，帮助理解网络通信的基本原理。接着，作者介绍了Wireshark在包分析中的关键角色，展示了如何通过Wireshark进行实际操作，包括捕获数据包、理解工作原理以及利用不同捕捉方法，如在hub-based网络和switched环境中使用Wireshark。 ARP中毒、通过路由器的数据包跟踪等内容也在此部分有所涉及，这些技巧在排查网络故障时至关重要。作者进一步解释了为何选择Wireshark作为分析工具，重点提到了其用户界面（GUI）和安装步骤，确保读者能顺利启动他们的抓包之旅。第二章深入探讨了过滤功能，这是Wireshark的强大特性之一。书中详细介绍了两种类型的过滤器：capture filters（捕获过滤器）用于预定义捕捉条件，提高数据收集效率；display filters（显示过滤器）则用于筛选和分析捕获的数据。此外，还介绍了如何保存和搜索过滤器以备后续使用。《Mastering Wireshark》是一本实用且全面的指南，适合IT专业人员、网络管理员和安全分析师学习网络故障排除、性能优化和协议分析。读者将通过本书掌握Wireshark的使用技巧，从而开启在网络世界中的深入探索与问题解决之路。" 此书涵盖了从基础概念到实战技巧的广泛内容，无论是初次接触Wireshark还是希望提升现有技能的专业人士，都能从中受益匪浅。通过阅读和实践书中的练习问题，读者将能够熟练掌握Wireshark这一强大的网络分析工具。"

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What this book covers
Chapter 1, Welcome to the World of Packet Analysis with Wireshark, provides you an
introduction to the basics of the TCP/IP model and familiarizes you with the GUI of
Wireshark along with a sample packet capture. Here, you will learn how to set up network
sniffers for analysis purpose.
Chapter 2, Filtering Our Way in Wireshark, talks about different filtering options available
in Wireshark, namely capture and display filters, and how to create and use different
profiles. Make yourself comfortable with the rich interface of Wireshark and start
capturing what you exactly want to.
Chapter 3, Mastering the Advanced Features in Wireshark, helps you look under the hood
of the statistics menu in Wireshark and work with the different command-line utilities that
come prepackaged with Wireshark. You will also learn how to prepare graphs, charts,
packet flow diagrams, and most important of all, how to become a command-line fu
master.
Chapter 4, Inspecting Application Layer Protocols, helps you understand and analyze the
normal and unusual behavior of application-layer protocols. Here, we will briefly discuss
the techniques you can use to understand the cause. We all are aware of the basics, but
have you ever thought how common application-layer protocol traffic can go crazy? In
this chapter, you will learn how to deal with them.
Chapter 5, Analyzing Transport Layer Protocols, shows how TCP and UDP protocols
work, how they communicate, what problems they face, and how Wireshark can be used
to analyze them. Make yourself a transport-layer doctor who can easily figure out
common anomalies and prove themselves worthy.
Chapter 6, Analyzing Traffic in Thin Air, shows you how to analyze wireless traffic and
pinpoint any problems that may follow. We will dive into the new world of wireless
protocol analysis, where you can become a Wi-Fi ninja.
Chapter 7, Network Security Analysis, shows you how to use Wireshark to analyze
network security issues, such as malware traffic, intrusion, and footprinting attempts. In
this chapter, you will learn how to figure out security anomalies, catch the hackers red
handed and make them cry like a baby, and experience how to solve CTF challenges.
Chapter 8, Troubleshooting, teaches you how to configure and use Wireshark to perform
network troubleshooting. Here, you will master the art of troubleshooting network issues
such as slow networks. You will also learn how to troubleshoot networking problems with
the most common daily-life examples.
Chapter 9, Introduction to Wireshark v2, shows you the amazing features launched in the
latest release of Wireshark with practical examples, such as USBpcap, intelligent scrollbar,
new graphs, and much more.