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IEEE 802.11 MAC Packet
Structure
•Frame Control: (2 bytes). Contain several
subfields and perform many functions.
1. Protocol version:(2 bits): indicates current protocol
2. Type : (2 bits): determine function of a frame, mgmt =00,
control=01, data=10, reserved=11.
3. Subtype : (4 bits) :subtype of type field, eg:- association,
beacon.
4. To DS / From DS : (1 bit each) for differentiating of
transmission of frames among stations and access points.
5. More Fragments : (1 bits) : to remind (if) more frames are left.
6. Retry : (1 bit) : to indicate retransmitted frame.
7. Power Management : (1 bit) :indicates the mode (power-save
mode) of station after successful transmission of a frame.
8. More data: (1 bit): to indicate that sender has more data to
send than the current frame, use by an access point, station.
9. Wired Equivalent Privacy (WEP)(1 bit): indicate that the
standard security mechanism of 802.11 is applied.
10.Order: (1 bit) : If this bit is set to 1 the received frames
must be processed in strict order
