The best example that I can give you for this is, the college networks where all the students are connected to the Wi-Fi router significantly slowing down the speed. So usually the only way to remove people from the network that you are using is via getting admin privileges to the router and then using the whitelisting or blacklisting method to mark devices on the basis of their MAC address and then remove from the network but unfortunately most of the time we don’t have admin privileges.

I mean if we had admin privileges to begin with we would have configured it in such a way so that problems like these wouldn’t happen in the first place. So now our goal is to block the users on our network or at least limit their internet speed without having admin.