On a dual-band wireless access point, 802.11ac radios can still serve legacy 802.11n clients. On which RF band(s) does this backward compatibility occur?
6 GHz only
Both 2.4 GHz and 5 GHz
2.4 GHz only
5 GHz only
802.11ac (Wi-Fi 5) is specified only for the 5 GHz band. When an 802.11ac access point detects a client that does not support 802.11ac, it falls back to 802.11n-but still on 5 GHz. The 2.4 GHz band is not part of the 802.11ac standard (although many access points include a separate 2.4 GHz radio for 802.11b/g/n).
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