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Role of Beacon frames in 802.11:

• The access points (APs) has to broadcast the beacon frames periodically over one of the 11 channels, according to the 802.11 standard.

• A beacon frame carries service set identifier (SSID) and medium access control (MAC) address of an AP.

• When a wireless station enters into a Wi-Fi jungle (which is formed by two or more APs), it scans 11 channels and seeks beacon frames from different APs.

• After knowing available APs through beacon frames, wireless station can associate with one of the available APs.

Therefore, the role of a beacon frame is to help a wireless station to discover and identify a nearby Access point (AP) to associate with it.

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