I’m doing some research on voting online and will use this page to do some testing.
This is the voting link from Poll-Maker.com
This is the Results link.
It does allow you to only allow one vote per machine.
I have found that each device I own – laptop, phone and desktop are each allowed one vote. Even when I go to Incognito Mode, that does not seem to make any difference.
They have different levels of security. I did not use the IP security test as they advised not to do that.