I am using 5 Cisco 1200 Series APs with both an A and G radio. Is there a benefit/problem to running both simultaneously? I would have one SSID and is setup for Fast Roaming as well. Thank you.

I have a WLAN with 5 1200 Series AP (A/G) configured for Fast Roaming using the Cisco supplied documentation. Can I use one user name for all of my devices to connect to the Internal Radius Server? This would be similar to having a passphrase for WPA...