Chapter 5

802.11 Control Frames

In this chapter, you will learn about the following:

  • Understanding Control Frames
  • Carrier Sense
    • Virtual Carrier Sense
    • Physical Carrier Sense
  • RTS/CTS Frames
  • CTS-to-self
  • Protection Mechanism
    • Preventing Collisions
    • ERP Information Element
    • Triggering Protection Mechanism
  • Acknowledgement Frame
  • Block Acknowledgement Request
  • Block Acknowledgement
  • PS-Poll
  • Control Wrapper
  • Contention Free

In this chapter, we will take a detailed look at the different control frames and discuss the purpose of each of the frames. Control frames are the traffic cops of the 802.11 network, assisting with the delivery of data and management frames.

Understanding Control Frames

In addition to defining frames that are used to transport ...

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