From the link below:
The newest generation of Wi-Fi signaling in popular use, 802.11ac utilizes dual band wireless technology, supporting simultaneous connections on both the 2.4 GHz and 5 GHz Wi-Fi bands. 802.11ac offers backward compatibility to 802.11b/g/n and bandwidth rated up to 1300 Mbps on the 5 GHz band plus up to 450 Mbps on 2.4 GHz.
The computer should still connect to a dual-band router which uses 802.11ac but will connect at the appropriate speed for the computer's wifi adapter.
Hope this helps.
I'm considering purchasing a cheap laptop that is listed as "802.11 b/g/n". I've done a little research on the different classes of routers and speeds. Does this mean that said laptop would not be able to connect (at all) with an A or an AC router, or that I could connect but it just wouldn't be able to receive data at the same speeds as these routers are capable of transmitting?
Thanks for your help, and sorry if I'm using any incorrect terminology...