Why do I get the "Detecting abnormal traffic from your computer network, please enter captcha to remove the restriction." prompt?

When accessing any of FontKe.com's web pages, the message "Detecting abnormal traffic from your computer network, please enter captcha to remove the restriction." indicates that FontKe.com has detected abnormal traffic in your computer network to confirm that these requests are Issued by you instead of an automated program. If you share a network connection with others, ask your administrator for help, which may be caused by multiple computers using the same IP address. In the meantime, if you can enter the verification code correctly, you can continue to use our service.