I was trying to be clear by writing in parentheses that b, g, n and ac were all protocols and not frequency specs but 
I infer that I missed. My router from the factory has the 5 GHz set to ac only but there's an option for a + n + ac as well. My router has individual settings for each frequency that allow me pick the protocol(s) for that frequency.
It also offers wpa2 & 3 in both personal and enterprise for security. As a hobbyist I'm interested in the wpa3 advantages but setting up a RADIUS server for the enterprise type seems like a lot of work with no big advantages. My NAS offers a package for that but I have enough to keep me busy. Since my PCs don't offer wpa3 personal, I'm not bothering with that either for the moment. 
The 802.11 article on wikipedia is long and includes protocols that I've not seen marketed in consumer routers.
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