I completed a survey that stated I am only allowed to do it once per day. If I try to do it again, I am not allowed as expected.
I am trying to find out how they know that it is from the same computer/network.
I tried doing the survey with another computer on the same LAN but it still didn't work. Then I thought they might be using my public IP and after changing that, it still didn't work on either computer.
Now I'm wondering how they uniquely identify my local network without relying on my public IP address? My next guess is that they are using the MAC-address of my router.
I want to know what are common/popular methods that websites use to do this type of thing.