802.11 frame:more duration of reserved frame seg transmission time (RTS/CTS) (for reliable ARQ) 2 2 6 6 6 2 6 0-2312 4 frame addressaddress address seg address duration 2 payload CRC control control 2 2 4 1 1 1 1 1 Protocol To From More Type Subtype Retry Power More AP AP frag WEP Rsvd version mgt data frame type (RTS,CTS,ACK,data) 6:Wireless and Mobile Networks 6-25 6: Wireless and Mobile Networks 6-25 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 Type From AP Subtype To AP More frag WEP More data Power mgt Retry Rsvd Protocol version 2 2 4 1 1 1 1 1 1 1 1 802.11 frame: more duration of reserved transmission time (RTS/CTS) frame seq # (for reliable ARQ) frame type (RTS, CTS, ACK, data)