I have a relatively new Toshiba laptop which supposedly supports 802.11a, so I'd assume 5GHz wireless networks should not be a problem.
My router supports the 802.11n and lower, it's an AVM 7270 VoIP router. I am close to a lot of other wireless networks in my apartment, so 2.4GHz is almost carpeted. Today I decided to give the 5GHz a go and switched to 802.11n/a on my router.
But then the network disappeared. Am I doing something wrong? IPv6 is turned off in my adapter. It's a Broadcom 802.11n.