Huawei Certified ICT Associate – Data Center Network (HCIA-DCN) — Question 149

If PPP authentication fails, which type of packet will be sent to the authenticated peer by the authenticator?

Answer options

• A. Authenticate-Reject.
• B. Authenticate-Reply.
• C. Authenticate-Nak.
• D. Authenticate-Ack.

Correct answer: A

Explanation

The correct answer is A, Authenticate-Reject, which is sent when authentication fails to inform the peer that access has been denied. The other options, such as Authenticate-Reply, Authenticate-Nak, and Authenticate-Ack, do not represent failure messages and are not sent in this scenario.