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An authentication technique that calls the sender back. After connection is made, the receiving side breaks the connection and calls the sender to ensure that the logon was made ...

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Callback can mean: Callback (computer science), executable code that is passed as a parameter to other code; Callback (telecommunicati ons), the telecommunicatio ns event that occurs when the originator of a call is immediately called back in a second call as a response; Callback verification, a method for e-mail address verification used in SMTP; Callback (comedy), a joke which refers to one previously told in a set of jokes including both; Callback (film), a 2005 film; Web callback, a technology that provides telephone callback ...

In computer programming, a callback is executable code that is passed as an argument to other code. It allows a lower-level software layer to call a subroutine (or function) defined in a higher-level layer. Usually, the higher-level code starts by calling a function within the lower-level code, passing to it a pointer or handle to another function.Motivat ion · Example · Implementation · Special cases

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