Multiple choice technology architecture

To ensure data integrity, which of the following does CHAP send across the PPP link to authenticate the remote client ?

  1. Plaintext password

  2. One-way hash value

  3. Digital signature

  4. Asymmetric encryption key
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

CHAP (Challenge Handshake Authentication Protocol) uses a one-way hash value to authenticate without sending the actual password across the link, protecting against eavesdropping. Plaintext passwords would be insecure, digital signatures are for non-repudiation, and asymmetric encryption is not CHAP's mechanism.

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