Saturday, November 24, 2012

Wireless Networking: Beacon Frames

Beacon Frames are the management packets broadcasted from Access Points(AP) to announce its presence. Beacon Frames contain critical information which is used by Clients to establish connections.

If Type is Zero and Subtype is 8 of a wireless packet then it is a Beacon Frame.

Critical information sent from AP areTimestamp for syncing between AP and Client.
Beacon Interval tells Client at what intervals AP sends Beacon Frames.
BSS ID or MAC Address of Access Point.
Service Set IDentifier(SSID) of AP, NETGEAR here.
Channel (11) being used which tells the frequency in which signals are transferred.
Rate at which AP can transmit data.

The receiver radio(Client) Interfaces/NIC's frequently scan all 802.11 radio channels and listen to beacons and interpret the to associates with AP with given credentials.
There are three main types of wireless packets
        Management (Type 0)
        Control (Type 1) and
        Data (Type 2)
Beacon Frames are sub classified under management packets, under these types of wireless packets there are many subtypes of packets.

Other posts which might be of interest to you.


  1. You are providing good information inside your blog. It will help a lot of people who want to know about wireless. Keep sharing informative blogs with us. Oracle Fusion Cloud Manufacturing training Course

  2. It proved to be Very helpful to me and I am sure to all the commentators here! Hellium Miner

  3. Octet: An octet, comprised of 8 pieces is only a customary 8 digit double number. By and large byte and octet are totally tradable. cheap hosting