I’ve an internet connection of 50Mbps, but on speed test on my laptop over WIFI, it shows variable speed, sometimes 20Mbps or sometimes even less than 1Mbps. So I connected WAN cable directly to my laptop, so then it showing the speed of 50Mbps exactly. So I’m pretty sure it is my router’s issue. But I want to check what’s my router’s max speed not the internet. How can I test this?