Given: XYZ Hospital plans to improve the security and performance of their Voice over Wi-Fi...

For troubleshooting fast roaming (e.g. 802.11r) across channels, a portable protocol analyzer with dual- or multi-band 802.11n adapters enables:

Simultaneous packet capture on different channels

Capturing handoff-related frames and timing analysis in roaming scenarios

This setup allows detailed capture of reassociation, authentication, and 4-Way Handshake processes, essential for diagnosing roaming delays.

Other options (WIPS, spectrum analyzer, autonomous AP) do not support detailed 802.11 frame capture across multiple channels during roaming events.