1. Wireshark
Open-source network protocol analyzer for deep packet inspection.
Wireshark is the standard utility for capturing and visually inspecting network packets across thousands of protocols. It runs on Windows, macOS, and Linux, providing powerful display filtering, TCP stream reconstruction, and export capabilities. Network administrators and security analysts globally rely on Wireshark for ad-hoc diagnostics and trace file analysis.
Pros
- Unrivaled library of dissectors covering legacy and modern protocols
- Sophisticated display filtering syntax with color-coded packet lists
- Active community development and extensive ecosystem documentation
Cons
- Can become unresponsive when loading multi-gigabyte capture files into memory
- Lacks centralized remote probe management out of the box
