Key ID octet

Identifies the key and marks the extended IV as present.

Subfields

• ExtIV — Always 1 for CCMP, indicating the extended IV octets are present.
• KeyID — Which of the four key slots was used. Non-zero values indicate a group key.

Where it sits

Protected Frame Body > CCMP Header > Key ID octet

• Open in the explorer — TCP over IPv4, in a protected QoS Data frame, aggregated
• Open in the explorer — TCP over IPv4, in a protected QoS Data frame

Accuracy

Clause

802.11-2024 §12.5.3.2

Verified

Not verified against the standard. Treat this as a claim, not a fact.