Wireshark Certified Analyst (WCA-101)

When an application slows down or a connection fails, many IT teams fall back on guesswork, vendor tickets, and finger-pointing between network, server, and app owners. This course gives your team a shared, evidence-based method: capture the traffic, filter to what matters, and read the protocol headers to find the root cause.

Role fit: Best suited to network administrators, IT support specialists, and cybersecurity analysts. It is intermediate level, and the early skills refresh the TCP/IP model and encapsulation, so newer techs can keep up alongside senior staff.

Time investment: Plan for about 35 hours per learner across 33 skills. Most skills run about an hour, which fits weekly team cadences. Team Leads can assign the filter and interface skills first for quick wins, then sequence the Ethernet, IPv4, and TCP deep dives.

Risk and compliance: The course covers practical uses that matter to audited environments, including troubleshooting slow connections, debugging protocol issues, and supporting security incident response with packet captures. Learners also review legal considerations for packet capture, including the need for explicit permission to capture traffic on networks and the risk of exposing personal or confidential data in captures.

Change management: Capture comments and custom profiles help analysts share findings and keep investigations consistent across the team.

Hands-on Virtual Labs close out the skills, and the final skill walks through multi-point troubleshooting scenarios. Together they build the hands-on practice your team needs for the WCA-101 exam. Team Reporting lets IT Directors track progress toward certification.

IT teams use this training to stop guessing during outages and start proving root cause from the packets themselves. The course ends with multi-point troubleshooting scenarios in which learners compare captures from different points on the network to find what users actually experienced. One example is a client that backs off because the server has no receive window left.

• Faster, evidence-based escalations: Your team learns to save and share clean captures, add comments to packets for teammates, and send precise evidence to vendors when a ticket stalls.
• Safer application rollouts: Team Leads can capture network behavior before and after a new application deploys, then compare performance to catch regressions early.
• Clearer root cause on connectivity issues: Practitioners learn to tell a failed TCP handshake apart from DNS or server problems. They also learn to read DHCP exchanges and relay behavior, and to spot MTU, window scaling, and delay issues using I/O, flow, and TCP stream graphs.
• Safer capture practices: Teams learn why authorization, internal policy, and careful file handling matter before capturing or sharing traffic, especially because packet captures can contain personal, confidential, or sensitive data. Practitioners also learn to identify top talkers, recognize application traffic, and use filters to investigate unexpected network behavior.

Hands-on labs at the end of each skill build the repetition the instructors emphasize. That practice is the muscle memory that helps IT Practitioners recognize problems faster on production networks.

Knowledge

• How Wireshark fits the TCP/IP model, including encapsulation and decapsulation, and the differences between the PCAP and PCAPNG file formats
• How capture filters differ from display filters, and how membership filters and operators narrow large captures to the packets that matter
• What the key fields in Ethernet, ARP, IPv4, ICMPv4, and IPv6 headers mean, including TTL, the Protocol field, and fragmentation and reassembly
• How UDP-based services such as DNS and DHCPv4 behave on the wire
• How TCP sets up, tracks, and ends sessions, covering the 3-way handshake, SEQ/ACK numbers, teardown, and reset behavior
• What Layer 2 attack traffic looks like in a capture, so suspicious patterns are easier to recognize

Ability

• Open, save, export, and annotate captures, adding packet and file comments so teammates can review the same evidence later
• Run time-limited captures and command-line captures with tools like dumpcap to record before-and-after baselines, collect evidence for vendor escalations, or archive captures for compliance records
• Build display filters, custom profiles, columns, and coloring rules that speed up analysis of busy captures
• Export objects directly from traffic and locate specific packets in seconds
• Use I/O graphs, flow graphs, and TCP stream graphs to see traffic trends and reconstruct conversations
• Compare captures from multiple capture points to help identify the root cause of real performance problems, such as traffic delays, unexpected protocol behavior, or differences between what each capture point records