CAPTCHA (от англ. "Completely Automated Public Turing test to tell Computers and Humans Apart" - "response test used in computing to determine whether or not the user is human."). Main test idea: offer user such a task to be solved easily by a person by cannot be solved by computer. For this purpose, character identification is used.
This section details, how to shield your website from malicious
botsRobot, or bot, as well as internet bot, www-bot, etc. — special software program, that runs automatic tasks, using interfaces, designed for humans.
, by configuring or setting up CAPTCHA.