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My question pertains to WiFi and not NS. My understanding of 802.11 protocols is that they have different ways of encoding the bits through different modulation schemes that depend on certain RSSI levels and how clean the RF they get from the Tx is (e.g. -60dBm is approximately what's necessary to get a 54Mpbs modulation scheme in 11g). My question is this....

If you have a base station (A) and a client station (B) and you are creating a link budget for passing frames from A->B... Is it feasible that the when you do the opposite direction (B->A) you will get different interferences depending on antenna configurations/output power/cable loss/free space issues? Now when you do A->B and B->A is it in the 802.11 protocols to agree on separate modulation schemes for each direction? For example, could I see a 54Mbps link for A->B, but a 36Mbps link from B->A? Also is an AP smart enough to give different bit rates to different clients (for arguments sake we'll operate in an 11g environment only, not mixed-mode) as well?

I apologize if this is already in the forums, but I tried a fair amount of keyword searches and was unable to dig anything up.