For example, you may want to capture frames on a 40MHz channel.

I highly recommend a free application called Airtool, which simplifies the capture of wireless frames in macOS by allowing easy channel selection and parameter modification. On macOS, an engineer can natively collect wireless frames through the built-in wireless card. The built-in network card is not capable of this because drivers may not allow a user to manually select a channel, or to place the wireless network in monitor mode. In a Windows operating system, you need a network card capable of capturing wireless frames. Before getting into the details of using Wireshark to capture WiFi traffic, let's go over the particular requirements.

Wireshark isn't just for wired networks wireless network engineers can utilize the tool to help them troubleshoot and diagnose various WiFi issues. Originally named Ethereal, the network analyzer is supported by a community that has added additional dissectors, features, and bug fixes. When it comes to open-source tools for network engineers, a top choice is Wireshark, created in 1997 by Gerald Combs, who needed a tool to track network problems.

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