Question: what is the difference between wireless-ac and wireless-b+g+n?
Answer: In fact 802.11ac uses the 5GHz band while 802.11n uses 5GHz and 2.4GHz. Higher bands are faster but lower bands travel further. ... It is built into the 802.11ac specification and is 'smart signal' which detects where connected devices are and increases signal strength specifically in their direction.