Revisiting WLAN frames
As this book deals with the security aspects of Wireless network, we will assume that you already have a basic understanding of the protocol and the packet headers. If not or if it's been some time since you worked on wireless network, this would be a good time to revisit it again.
Let us now quickly review some basic concepts of WLANs which most of you may already be aware of. In WLANs, communication happens over frames. A frame would have the following header structur:
The "Frame Control" field itself has a more complex structue:
The Type field defines the type of WLAN frame, which has three possibilities:
Management frames: Management frames are responsible for maintaining communication between the access points and wireless clients. The Management frames can have the following sub-types:
Authentication
De-authentication
Association Request
Association Response
Reassociation Request
Reassociation Response
Disassociation
Beacon
Probe Request
Probe Response
Control frames:...
