question about duplex mode of wlan

the following clause is copy from BCMSN student guide:

TIP IEEE 802.11 WLANs are always half-duplex because transmitting and receiving stations use the same frequency. Only one station can transmit at any time; otherwise, collisions occur. To achieve full-duplex mode, all transmitting would have to occur on one frequency and all receiving would occur over a different frequency—much like full-duplex Ethernet links work. Although this is certainly possible and practical, the 802.11 standards don’t permit full-duplex operation.

does these mean that all currently engaged wlan is running in half-duplex mode ? for all i know，all currently wlan is running under IEEE802.11 standard, like 802.11b、802.11g...etc.

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Chris:/*

Yes all WLAN is running in Half-Duplex mode.

chmorin

Chris:/* wrote: »

Yes all WLAN is running in Half-Duplex mode.

...and with headers the size of the moon. Stuff like this is why when people request a wireless phone I cringe. It's basically a hub mounted on the ceiling.

creamy_stew

chmorin wrote: »

...and with headers the size of the moon. Stuff like this is why when people request a wireless phone I cringe. It's basically a hub mounted on the ceiling.

LOL,

"That's no moon!"

It's a 802.11 header!

szokp

thanks for all replies!