Siemens IEEE802.11 - Manual (Page 40)

WLAN-IEEE802.11 Tutorial (Maximilian Riegel), 021018-wlan-tutorial.ppt Page 40 © Siemens, 2002
To DS From DS Address 1 Address 2 Address 3 Address 4
0 0 DA SA BSSID N/A
0 1 DA BSSID SA N/A
1 0 BSSID SA DA N/A
1 1 RA TA DA SA
Address Field Description
n
Addr 1 = All stations filter on this address.
n
Addr 2 = Transmitter Address (TA)
– Identifies transmitter to address the ACK frame to.
n
Addr 3 = Dependent on To and From DS bits.
n
Addr 4 = Only needed to identify the original source of
WDS (Wireless Distribution System) frames.