Element ID ID

MAC 1 octet SSID element unverified

Identifies which element this is. Zero here.

Reading a capture

One octet, so 256 possible elements — and they ran out. Element ID 255 now introduces an extension identifier in the body, which is why modern elements are cited as 255 plus a second number.

Where it sits

SSID > Element ID

Open in the explorer — Association Request
Open in the explorer — Association Response
Open in the explorer — Beacon
Open in the explorer — Probe Request
Open in the explorer — Probe Response

Accuracy

Clause: 802.11-2024 §9.4.2.1
Verified: Not verified against the standard. Treat this as a claim, not a fact.