Thanks for your reply
If the browser cache limit is added to the IP limit, the test capability will be increased for non-members.
Because there is finally the ability to test from non-members in this plugin, but when the probability of fraud is very high due to the lack of browser cache, we can never use this feature of the plugin and it seems that this feature does not exist in the plugin. Please also create a browser cache if possible, as in many cases it is not possible to test only members of the site and sometimes the user cannot be forced to join the site. With your explanation, I don’t think it’s possible to take the test anymore using IP restrictions. Thanks.