Huawei Certified Network Associate – Routing and Switching (HCNA-RS, legacy) — Question 159

In the PPP protocol, which of the following encryption algorithms is used by CHAP?

Answer options

• A. DES
• B. MD5
• C. AES
• D. None

Correct answer: B

Explanation

The correct answer is B, as CHAP (Challenge Handshake Authentication Protocol) employs MD5 for hashing and verifying credentials. Options A (DES) and C (AES) are symmetric encryption algorithms, which are not used by CHAP. Option D is incorrect because CHAP does use MD5.