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350-401 · Question #887
350-401 Question #887: Real Exam Question with Answer & Explanation
The correct answer is B: MD5 authentication keys. NTP security can be implemented using MD5 authentication keys to ensure the authenticity of time sources and access control lists (access-groups) to restrict which devices can interact with the NTP server.
Submitted by lukas.cz· Mar 6, 2026
Question
You want to securely implement the Network Time Protocol (NTP) on your network. What two mechanisms are available to secure NTP? (Choose two.)
Options
- AIPSec communication
- BMD5 authentication keys
- CRole based access control (RBAC)
- Daccess-group configuration
Explanation
NTP security can be implemented using MD5 authentication keys to ensure the authenticity of time sources and access control lists (access-groups) to restrict which devices can interact with the NTP server.
Common mistakes.
- A. IPSec communication can secure general network traffic, but it is not a native or built-in authentication mechanism specific to the NTP protocol itself for securing its operations.
- C. Role-based access control (RBAC) is an authorization model for managing user permissions to systems or applications, not a direct security mechanism for the NTP protocol's communication or time synchronization.
Concept tested. NTP security mechanisms
Topics
#NTP security#MD5 authentication#Access Control Lists
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