> So for example your 600mbps WiFi channel actually beacons and does the handshake at 10mbps (or whatever the negotiation speed is specified to be) 802.11 beac

> So for example your 600mbps WiFi channel actually beacons and does the handshake at 10mbps (or whatever the negotiation speed is specified to be) 802.11 beacons are sent at the lowest basic rate configured for the network, which in the old days was 1 Mbit/sec, but it's entirely possible to simply not advertise that in the beacon (it's commonly done in larger networks, as you don't want clients to be eating airtime by sending such slow packets), and then the beacon goes out at whatever higher rate. The association can be done at any rate the client wants to, as far as I know, as long as it is listed in the beacon.