In a closed system WLAN, which frames do not advertise the network's SSID?

In a closed system WLAN, which frames do not advertise the network's SSID?

• A. Beacons
• B. Data frames
• C. Probes
• D. Association frames

Answer: (A)

Beacons are the frames that normally broadcast the network name. They’re sent periodically by the access point and include the SSID in their information elements so nearby devices can discover and identify the network. In a closed (hidden) WLAN, the SSID information in these beacon frames can be suppressed or left empty, so the network name isn’t advertised in those frames. Other frame types—those used for carrying data or handling the join process—aren’t intended to announce the network’s SSID to listeners, so they aren’t the ones that publicly advertise the SSID.

Beacons are the frames that normally broadcast the network name. They’re sent periodically by the access point and include the SSID in their information elements so nearby devices can discover and identify the network. In a closed (hidden) WLAN, the SSID information in these beacon frames can be suppressed or left empty, so the network name isn’t advertised in those frames. Other frame types—those used for carrying data or handling the join process—aren’t intended to announce the network’s SSID to listeners, so they aren’t the ones that publicly advertise the SSID.