Book Image

Learn Wireshark, - Second Edition

By : Lisa Bock
5 (1)
Book Image

Learn Wireshark, - Second Edition

5 (1)
By: Lisa Bock

Overview of this book

Wireshark is a popular and powerful packet analysis tool that helps network administrators investigate latency issues and potential attacks. Over the years, there have been many enhancements to Wireshark’s functionality. This book will guide you through essential features so you can capture, display, and filter data with ease. In addition to this, you’ll gain valuable tips on lesser-known configuration options, which will allow you to complete your analysis in an environment customized to suit your needs. This updated second edition of Learn Wireshark starts by outlining the benefits of traffic analysis. You’ll discover the process of installing Wireshark and become more familiar with the interface. Next, you’ll focus on the Internet Suite and then explore deep packet analysis of common protocols such as DNS, DHCP, HTTP, and ARP. The book also guides you through working with the expert system to detect network latency issues, create I/O and stream graphs, subset traffic, and save and export captures. Finally, you’ll understand how to share captures using CloudShark, a browser-based solution for analyzing packet captures. By the end of this Wireshark book, you’ll have the skills and hands-on experience you need to conduct deep packet analysis of common protocols and network troubleshooting as well as identify security issues.
Table of Contents (28 chapters)
1
Part 1 Traffic Capture Overview
6
Part 2 Getting Started with Wireshark
11
Part 3 The Internet Suite TCP/IP
16
Part 4 Deep Packet Analysis of Common Protocols
21
Part 5 Working with Packet Captures

Questions

Now it's time to check your knowledge. Select the best response, and then check your answers, which can be found in the Assessment appendix:

  1. ____ is a metric that measures the time it takes to transmit a packet from one point to another and can be measured using RTT.
    1. Latency
    2. Packet loss
    3. Goodput
    4. Throughput
  2. ____ is the amount of data that is sent and received (typically in bits per second) at any given time.
    1. Latency
    2. Packet loss
    3. Goodput
    4. Throughput
  3. In Wireshark, the _____ is on the right-hand side of the packet list panel and displays a distinct coloring pattern based on the coloring rules set in the application.
    1. Group metrics
    2. Time values
    3. Intelligent Scrollbar
    4. Goodput meter
  4. A _____ is a special type of packet that does not have any data. It only has the ACK flag set, so the client knows to keep the session active during an HTTP session.
    1. Duplicate acknowledgment
    2. Keep-alive
    3. Retransmission
    4. Fast retransmission
  5. When viewing the expert information icon, a cyan circle indicates...