During a dense city conference, captures show HE/VHT operating mode notifications as a client drops from 80 MHz to 20 MHz under interference. What do those frames indicate?
Select an answer to reveal the explanation.
Short Explanation
That client just downshifted from an 80 MHz highway to a 20 MHz side street and sent an operating mode postcard saying so. Watch those notifications when throughput tanks under interference—they're the gear-change evidence.
Full Explanation
VHT/HE operating mode notification mechanisms allow STAs or APs to signal changes such as reduced channel width or NSS without full reassociation. Captures showing OMN activity around an 80→20 MHz shift explain sudden capacity loss under interference or OBSS pressure. Protocol analysts should track these dynamic PHY/MAC mode changes instead of assuming only static Beacon capabilities apply for the whole session.