Supported NTP Authentication Types
Question
On a Cisco WLC, which NTP authentication type or types are supported?
Answers
Explanations
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A. B. C. D. E.C.
On a Cisco Wireless LAN Controller (WLC), the following Network Time Protocol (NTP) authentication types are supported:
MD5: This is a widely used NTP authentication method that provides message integrity and ensures that the NTP messages are not altered in transit. The MD5 algorithm generates a fixed-size message digest from variable-sized input data.
DES: This is an encryption-based NTP authentication method that provides message confidentiality and ensures that the NTP messages are not read by unauthorized entities. DES uses a 56-bit key to encrypt the NTP messages.
DES-CBC: This is an improved version of the DES authentication method that uses Cipher Block Chaining (CBC) mode to provide better security than DES. CBC mode uses an initialization vector (IV) to obscure the relationship between plaintext and ciphertext.
Therefore, the correct answer is B: MD5, DES, and DES-CBC.
It is important to note that when configuring NTP authentication on a Cisco WLC, the NTP server and the WLC must use the same authentication type, key, and key ID. If there is a mismatch, the NTP synchronization fails.
