Captcha is is a type of challenge-response test used in computing to ensure that the response is not generated by a computer. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade. Because other computers are unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human (Wikipedia, 2010)
Captcha is used in the ticketed support module, testimonials module and the knowledge base module (when users provide feedback). It can be turned on or off depending on your requirements.
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