Multiple choice technology security

A CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is primarily for:

  1. Distinguishing a computer from a human, primarily to restrict the access

  2. Supporting multifactor authentication

  3. Provide a secure channel for client server communication

  4. Providing a friendly interface between human and computers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

CAPTCHA is designed to differentiate humans from bots by presenting tasks easy for humans but hard for computers. This prevents automated abuse like spam, brute-force attacks, and bot registrations. Option A correctly identifies its primary purpose of access restriction based on humanity verification. The other options confuse CAPTCHA with security concepts like MFA (B), encrypted communication (C), or UX design (D).

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