October 2003
Intermediate to advanced
368 pages
9h 48m
English
Content preview from Field Guide to Wireless LANs for Administrators and Power Users, A
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Structure of the IEEE 802.11 MAC Frames
As we saw previously, there are three types of frames, and in this subsection they will be discussed in the following order: Control, Management, and Data.
IEEE 802.11 Control Frames
Figure 4-5 shows the format of all six types of Control frames, which are all very short. The first four types of Control frames (Request-to-Send, Clear-to-Send, Acknowledgment, and Power-Save Poll) are the most common.
Figure 4-5. IEEE 802.11 Control frames
RTS and CTS
The RTS/CTS mechanism can be used to protect the transmission of an MPDU or MMPDU, by reserving the medium in advance of the actual transmission of the frame. ...
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