802.11 frame:addressing 2 2 6 6 6 2 6 0-2312 4 frame address address address address duration seq control 1 2 3 CRC control 4 payload Address 4:used only in ad hoc mode Address 1:MAC address of wireless host or AP Address 3:MAC address to receive this frame of router interface to which AP is attached Address 2:MAC address of wireless host or AP transmitting this frame 6:Wireless and Mobile Networks 6-23 6: Wireless and Mobile Networks 6-23 frame control duration address 1 address 2 address 4 address 3 payload CRC 2 2 6 6 6 2 6 0 - 2312 4 seq control 802.11 frame: addressing Address 2: MAC address of wireless host or AP transmitting this frame Address 1: MAC address of wireless host or AP to receive this frame Address 3: MAC address of router interface to which AP is attached Address 4: used only in ad hoc mode