Which antenna is which on 11b/g router?

[MntnMan8000]

I have an 11b/g router, WRT54G (http://www.linksys.com/products/product.asp?grid=33&scid=35&prid=601), I am using it in 11b mode. Am I using both antennas? Is one antenna dedicated to 11b the other to 11g?

Thank you

[BlueComm]

No, two antennas are for diversity. The b means you get a maximum of 11 megabits per second (measured speed) and g means 54 megabits per second. 5 times faster in speed. Your WAP54G works with either/or 11g or 54g devices. Either way, it works on the same frequency which is 2.4 Ghz.
Hope this helps.
:D