A single 802.11b barcode scanner remains on the city’s 2.4 GHz faci…

Question

A single 802.11b barcode scanner remains on the city’s 2.4 GHz facilities SSID. Throughput for modern clients collapses whenever the scanner is active. What performance mechanism explains most of that loss?

Accepted Answer

Protection-mode overhead (e.g., RTS/CTS or other ERP protection) taxes the entire BSS so OFDM clients slow down for coexistence — One old bicycle on a bike path can force everyone else to ride single-file. An 802.11b holdout triggers protection so modern clients announce themselves the slow way. That tax hits the whole 2.4 GHz BSS—retire or isolate the legacy scanner.

Answer

The scanner’s DHCP renewals exhaust the VLAN’s address pool

Answer

WPA3-Enterprise cannot encrypt 802.11b frames, so the AP drops all other traffic

Answer

OFDMA trigger frames force every HE client to wait for DSSS beacons only

A single 802.11b barcode scanner remains on the city’s 2.4 GHz facilities SSID. Throughput for modern clients collapses whenever the scanner is active. What performance mechanism explains most of that loss?

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