In Mac OS X 10.5, the AirPort icon in the menu bar had a trick up its sleeve—hold down Option when clicking the icon, and you’d see more information about the various available AirPort networks -
The hardware (MAC) address of the wireless station, which channel is in use, the signal strength (RSSI), and finally an indication of the data transmission rate.
In Snow Leopard, this feature has been expanded, you can also see what mode your connected network is using (802.11n, for instance), security (WPA2 Personal), MCS Index, which appears to be related to the 802.11n standard.
tags: airport,
network
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