https://blog.wongcw.com/2022/11/13/2-4-ghz-vs-5-ghz-wi-fi%ef%bc%9a%e4%bd%a0%e6%87%89%e8%a9%b2%e4%bd%bf%e7%94%a8%e5%93%aa%e7%a8%ae%ef%bc%9f/