Frame Body Body

Three fixed fields, then the element list.

Reading a capture

Note there is no QoS Control field above and no protection here — a beacon is a management frame sent in the clear, which is exactly why it is readable in a capture of an encrypted network.

Subfields

• Timestamp — The AP's microsecond clock, used by every station to stay synchronised with it.
• Beacon Interval — How often a beacon is sent, in time units of 1024 microseconds.
• Capability Information — Sixteen bits advertising what the BSS supports and requires.

Where it sits

Beacon MPDU > Frame Body

• Open in the explorer — Beacon

Accuracy

Clause

802.11-2024 §9.3.3.2

Verified

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