Wireshark is a network traffic capture and analysis tool. With it, users can capture, inspect, and explore the network data sent and received by their computer. For computer networking professionals, Wireshark is an invaluable tool in debugging network connection issues. A Wireshark traffic recording captures the exact network packets sent and received. Wireshark includes a large library of network protocol decoders, called traffic dissectors, that parse and interpret the captured data, displaying it in a form more suited to human consumption. Users can also use the built-in filtering language to select only a specific subset of the recorded traffic that they wish to inspect. Wireshark is also able to read and analyze packet captures recorded by a number of commercial firewalls and routers. Wireshark executables can be downloaded for Windows and macOS. Most Linux distributions include a Wireshark package in their repositories. Wireshark is free software, distributed under the GNU General Public License, with source code available for download alongside the pre-built executables.