As this book deals with the security aspects of wireless, 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, this would be a good time to revisit this topic again.
Let's now quickly review some basic concepts of WLANs that most of you may already be aware of. In WLANs, communication happens over frames. A frame would have the following header structure:
The Frame Control
field itself has a more complex structure:
The Type field defines three types of WLAN frame: