Packet Capture and Wireshark Fundamentals
The network analyst's microscope.
Key takeaways
- Wireshark captures and dissects packets at every OSI layer.
- Display filters isolate specific traffic (e.g., "http", "dns", "ip.addr == 10.1.1.1").
- Protocol dissectors decode application-layer content.
- For SOC analysts, PCAP is the ground truth for incident investigation.
Wireshark is to network analysts what a stethoscope is to a doctor. It lets you see the actual bytes on the wire, decoded into human-readable protocol fields.
Knowledge check
In Wireshark, what does "Follow TCP Stream" show you?
Who does this for real
The services where Vijilan runs this work for partners and their clients.