This 4-day instructor-led training course shows learners how to use Wireshark to view, capture, analyze, and troubleshoot network traffic. Emphasis is placed on a hands-on lab-based approach where learners use Wireshark on a live network. The course is vendor-agnostic and is not specific to any single model or brand of networking gear like Cisco, Juniper, Intel, or HP. The course covers protocol analysis and troubleshooting across all vendors and types of network infrastructure.
This course is taught by instructor and author Dr. Avril Salter, CCNP-W, CCNA-S. Dr. Salter has extensive experience in packet-level network analysis and frequently lectures on this topic. She is a guest instructor at numerous telecommunications and network companies, teaching their internal staff to perform network analysis on the equipment that they design and manufacture. This experience gives Dr. Salter the unique, industry-wide perspective that she brings to the classroom.
Module 1: Wireshark Fundamentals
- Introduction to Wireshark
- When to use Wireshark
- Where to physically connect
- Wireshark Graphical User Interface
- Capturing network traffic
- Install Wireshark
- Explore Wireshark installation
- Capture and save network traffic
- Understanding the packet details pane
Module 2: Viewing network protocols with Wireshark
- Capture filters
- Display filters
- Time stamps
- Mark and ignore packets
- Import and export packet captures
- Capture filters
- Display filters
Module 3: Analyzing tools and troubleshooting techniques
- Troubleshooting methodology
- Configuration profiles
- Creating coloring rules
- Establishing a baseline
- Leveraging Wireshark statistical reports and graphs
- Custom profile
- Coloring rules
- Traffic baselines
Module 4: Analyze and troubleshoot Layer 2 protocols
- Ethernet frames
- MAC addresses
- ARP request/response procedure
- BPDU format
- Bridge selection
- Port states
- 802.1Q frame encapsulation
Module 5: Analyze and troubleshoot wireless protocols
- How to sniff wireless networks
- 802.11 WLAN traffic
- Radiotap information
- Beacons and network capabilities
- ZigBee and ZigBee Pro
- IEEE 802.11
Module 6: Analyze and troubleshoot /P
- IPv4 header
- IPv4 address
- IP packet fragmentation
- ICMP messaging
- RPL and 6LoWPAN to support the IoT
- RPL / 6LoWPAN (OPTIONAL)
Module 7: Analyze and troubleshoot TCP
- Establishing a TCP connection
- TCP header
- Port numbers and sockets
- Selective acknowledgements
- Sliding window
- Contention and advertised receiving windows
- Congestion control
- TCP 3-Way Handshake
- TCP fields
- TCP traffic
Module 8: Analyze and troubleshoot UDP and higher level protocols
- Compare and contrast TCP and UDP
- UDP header
- DHCP communications
- DNS process
- UDP, DNS and DHCP
Module 9: Course wrap up and best practices
- Managing trace files
- Course wrap up
This course is designed for advanced IT networking professionals who work on wired and wireless networks and need to perform network assessment, traffic analysis, and enterprise-wide network troubleshooting.
Students must be experienced with deploying, managing, and operating enterprise-level networks. Learners must also have a full understanding of the TCP/IP protocol stack and IP routing. No prior experience with Wireshark is required.
What You Will Learn
In this class, you will learn how to:
- Understand key network protocols in today’s enterprise wired and wireless networks. Analyzed protocols include: HTTP, TCP, UDP, IP, DHCP, DNS, ICMP, Ethernet, IEEE 802.11, Bluetooth, ZigBee, and ZigBee IP.
- View and analyze network traffic.
- Capture and filter network traffic.
- Analyze previously captured network traffic.
- Develop reusable profiles for analyzing and troubleshooting network traffic.
- Interpret the Wireshark graphs and statistical reports.
- Identify and troubleshoot common network problems, including:
Bandwidth performance issues.