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Which of the following can be defined as a framework that supports multiple, optional authentication mechanisms for PPP, including cleartext passwords, challenge-response, and arbitrary dialog sequences?
Correct Answer: A
Explanation/Reference: Explanation: Extensible Authentication Protocol (EAP) is defined as: A framework that supports multiple, optional authentication mechanisms for PPP, including clear-text passwords, challenge-response, and arbitrary dialog sequences. The Extensible Authentication Protocol (EAP) is a protocol for wireless networks that expands on authentication methods used by the Point-to-Point Protocol (PPP), a protocol often used when connecting a computer to the Internet. EAP can support multiple authentication mechanisms, such as token cards, smart cards, certificates, one-time passwords, and public key encryption authentication. Incorrect Answers: B: The definition in the question does not describe Challenge Handshake Authentication Protocol. C: The definition in the question does not describe Remote Authentication Dial-In User Service. D: The definition in the question does not describe Multilevel Authentication Protocol. References: http://www.sans.org/security-resources/glossary-of-terms/?pass=e http://searchsecurity.techtarget.com/definition/Extensible-Authentication-Protocol-EAP