Wireshark-users: [Wireshark-users] What (RA) next to destination MAC addr. stands for?

From: "ph3arconf@xxxxxxxxx" <ph3arconf@xxxxxxxxx>
Date: Tue, 29 Sep 2009 14:59:34 +0200

Hello everyone,

I have searched a bit, but I couldn't find what (RA) located next to
destination MAC address stands for?

xx:xx:xx:xx:xx:xx (RA)	IEEE 802.11	Acknowledgement, Flags