List of PPDUs Supported in 802.11i

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.

How does 802.11i affect the PPDU format?

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

What components make up a PPDU?

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

Does PPDU size change with 802.11i encryption?

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

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.

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.

Can PPDU errors affect security?

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

How is PPDU synchronization maintained in 802.11i?

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

Does 802.11i encryption add overhead to the PPDU?

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

Are acknowledgments part of PPDU?

Yes, ACK frames are transmitted as PPDUs.

Does PPDU structure differ for control frames under 802.11i?

Control frame PPDUs remain mostly unchanged.

How does 802.11i impact PPDU timing?

Processing for encryption/decryption may add slight timing delays.

Is PPDU aggregation supported with 802.11i?

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

Can PPDU payloads contain multiple MAC frames?

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

How does 802.11i ensure secure payloads inside the PPDU?

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

Are PPDU formats standardized internationally?

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

Does PPDU carry key exchange frames in 802.11i?

Yes, key management frames are transmitted within PPDUs.

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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