Bit Field Guide

Key Ack

Encryption 1 bit EAPOL-Key descriptor unverified

A response is expected to this message.

Reading a capture

Set in messages 1 and 3, which are the two the AP sends. Ack without MIC is message 1; with both, message 3.

Where it sits

EAPOL-Key > Key Information > Key Ack

Open in the explorer — Four-way handshake message 1
Open in the explorer — Four-way handshake message 2
Open in the explorer — Four-way handshake message 3
Open in the explorer — Four-way handshake message 4

Accuracy

Clause: 802.11-2024 §12.7.2
Verified: Not verified against the standard. Treat this as a claim, not a fact.