I am user of BT hub and I have connected my computer to through Ethernet Link. I have recently recognized that someone is trying to accessing the internet by using the hub. I want to know that fellow is using my download quota which is offered by ISP? Also I want to know whether he is able to access the broad for free. Is there any way to prevent him? Can I switch off wireless network of the hub? Please provide me appropriate solution on this matter.
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