In the analyzer trace shown, the TBTT is nominally 102.5 milliseconds.

Why does the Beacon transmission interval vary?

A.
The access point must arbitrate to gain access to the RF medium in order to transmit a Beacon.

B.
The DCF Interframe space (DIFS) is nominally 50 µs, but typically varies by as much as 10 µs, which
causes delays in Beacons.

C.
This trace shows an HT network where HR/DSSS nodes are active on the network. The access point ischanging slot times from short to long as needed.

D.
Beacon frames vary in size, and therefore some take slightly longer to send than others.