Explain what the advanced options mean

[brendanlong]

For example, what is 11ACVHT80? How does it different from 11A, 11ACVHT20, and the other options?

There are a lot of other settings which are confusing, but this is the worst because it seems to be some sort of internal acronym, judging by the lack of information on the internet:

https://duckduckgo.com/?q=11ACVHT80

[frichter09]

The last number refers to channel width 20MHz, 40, 80 etc.
Not sure about 11A... maybe Wireless A operation only? (Bgn disabled?).
@Lars, is there a way to only have wireless n or ac activated and disable the b and g standards?

[LGNilsson]

I've noticed this is missing and I've added a request with the software team to get that done.
Not sure why there's no N mode on the 5GHz band as well, as A only is pretty useless I'd say.

[Tiger Woods]

For example, what is 11ACVHT80? How does it different from 11A, 11ACVHT20, and the other options?

There are a lot of other settings which are confusing, but this is the worst because it seems to be some sort of internal acronym, judging by the lack of information on the internet:

https://duckduckgo.com/?q=11ACVHT80

http://wiki.openwrt.org/doc/uci/wireless#mhz.channel.width.up.to.300.mbps.for.802.11n.devices.only

This gives a little bit of information.  The 11AC refers to the standard (802.11ac) and the VHT80 refers to the broadcast channel width.  I think the HT is normally associated with a 40Mhz channel width, and VHT for 80 with 20MHz being the standard (normal).