List of PPDUs Supported in 802.11i
========================================


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        **What is a PPDU in the context of IEEE 802.11i?**

        A PPDU is the Physical Protocol Data Unit, representing the complete frame transmitted at the PHY layer.

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        **How does 802.11i affect the PPDU format?**

        802.11i mainly secures the MAC layer, but encryption affects the payload encapsulated within the PPDU.

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        **What components make up a PPDU?**

        Preamble, header, data payload (including MAC frame), and tail bits.

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        **Does PPDU size change with 802.11i encryption?**

        The encrypted payload within the PPDU may be larger due to added security headers and MIC.

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        **How does PPDU relate to data rates in 802.11i?**

        PPDU transmission speed depends on the selected physical data rate; encryption doesn’t change this.

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        **Are there different PPDU types for various 802.11 standards secured by 802.11i?**

        Yes, 802.11a/g/n/ac have different PPDU formats; 802.11i operates atop these.

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        **Can PPDU errors affect security?**

        Yes, corrupted PPDUs can cause decryption failures and require retransmission.

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        **How is PPDU synchronization maintained in 802.11i?**

        Standard PHY synchronization methods are used; security does not alter this.

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        **Does 802.11i encryption add overhead to the PPDU?**

        Overhead is added at the MAC layer but encapsulated within the PPDU payload.

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        **Are acknowledgments part of PPDU?**

        Yes, ACK frames are transmitted as PPDUs.

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        **Does PPDU structure differ for control frames under 802.11i?**

        Control frame PPDUs remain mostly unchanged.

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        **How does 802.11i impact PPDU timing?**

        Processing for encryption/decryption may add slight timing delays.

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        **Is PPDU aggregation supported with 802.11i?**

        Yes, frame aggregation at the PHY layer is compatible with 802.11i security.

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        **Can PPDU payloads contain multiple MAC frames?**

        Yes, via aggregation, multiple MAC frames can be transmitted in a single PPDU.

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        **How does 802.11i ensure secure payloads inside the PPDU?**

        Encryption and integrity checks secure the MAC payload encapsulated in the PPDU.

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        **Are PPDU formats standardized internationally?**

        Yes, defined by IEEE 802.11 PHY specifications, with 802.11i applying security above.

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        **Does PPDU carry key exchange frames in 802.11i?**

        Yes, key management frames are transmitted within PPDUs.

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        **How are corrupted PPDUs handled in 802.11i networks?**

        They are discarded and retransmission is requested to maintain security and data integrity.



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        Topics in this section,

                * :ref:`Reference links <ppdu_i_step17>`

.. _ppdu_i_step17:

.. tab-set::

    .. tab-item:: Reference links
     
       * Reference links