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, then check your answers, which can be found in the Assessment appendix:

  1. A _____ is defined as an IP address and a port.
    1. window
    2. socket
    3. checksum
    4. sequence
  2. ACK 725 means I have received _____ bytes of data and I am ready for more, starting with _____.
    1. 700 and 800
    2. 724 and 725
    3. 725 and 726
    4. 725 and 725
  3. The _____ flag informs TCP that data should be sent immediately.
    1. RST
    2. SYN
    3. ACK
    4. PSH
  4. If the offset value is 0101, the TCP header length = ___ bytes.
    1. 32
    2. 8
    3. 20
    4. 64
  5. In a normal connection, ___ will use UDP.
    1. HTTP
    2. SMTP
    3. DHCP
    4. FTP
  6. Unlike TCP, a UDP header does not have any _____.
    1. ports
    2. sockets
    3. checksums
    4. options
  7. If the client advertises a scaling factor of 9, the OS will need to multiply the WS by ____.
    1. 2
    2. 9
    3. 128
    4. 512