Beacon frames are used by the access points (and stations in an IBSS) to communicate throughout the serviced area the characteristics of the connection offered to the cell members. The beacon frames are sent periodically by 1,024 microseconds
The following picture shows an example of a beacon capture. A beacon contain mandatory elements but also optional and vendor elements.
The following picture shows the Beacon Frame Structure.
The following Table lists the elements and fields you can expect to find (mandatory or optional) in
a beacon frame. Most elements are defined in the 802.11-2007 standard. Some of them are introduced by specific amendments (and therefore used only by vendors implementing those amendments). The 802.11k introduces processes for Radio Resource Management to help dynamically assign APs channels and power levels. The 802.11w introduces the Management Frame Protection. The 802.11r introduces Fast Basic Service Set transition (fast roaming between APs).
The following picture shows an example of a beacon capture. A beacon contain mandatory elements but also optional and vendor elements.
wlan.fc.type_subtype == 0x0008
The following picture shows the Beacon Frame Structure.
above the picture from CWAP
a beacon frame. Most elements are defined in the 802.11-2007 standard. Some of them are introduced by specific amendments (and therefore used only by vendors implementing those amendments). The 802.11k introduces processes for Radio Resource Management to help dynamically assign APs channels and power levels. The 802.11w introduces the Management Frame Protection. The 802.11r introduces Fast Basic Service Set transition (fast roaming between APs).
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