Question: is ac wifi backwards compatible?
Answer: 802.11ac is backwards compatible with 802.11n 802.11ac falls back to 802.11n to serve clients that don't support 802.11ac. ... Dual-band APs like the MR34 will seamlessly serve 802.11ac and 802.11a/n clients in the 5 GHz band, and 802.11b/g/n in the 2.4 GHz band.