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Juniper

JN0-102 · Question #202

Which statement is true regarding the Network Time Protocol (NTP) on Junos devices?

The correct answer is A. MD5 authentication is supported by the Junos OS.. Junos OS supports MD5 authentication for NTP, enhancing security by verifying the authenticity of NTP packets exchanged between the device and NTP servers. This protects against unauthorized time modifications.

Junos OS Fundamentals

Question

Which statement is true regarding the Network Time Protocol (NTP) on Junos devices?

Options

  • AMD5 authentication is supported by the Junos OS.
  • BServer mode is not supported by the Junos OS.
  • CThe Junos OS can provide a primary time reference.
  • DThe Junos OS does not support the use of a boot server.

How the community answered

(43 responses)
  • A
    91% (39)
  • B
    2% (1)
  • C
    5% (2)
  • D
    2% (1)

Why each option

Junos OS supports MD5 authentication for NTP, enhancing security by verifying the authenticity of NTP packets exchanged between the device and NTP servers. This protects against unauthorized time modifications.

AMD5 authentication is supported by the Junos OS.Correct

Junos OS fully supports MD5 authentication for NTP, allowing administrators to configure a shared secret key that is used to generate a Message Digest 5 (MD5) hash for each NTP packet. This ensures that time synchronization messages are authentic and prevents tampering.

BServer mode is not supported by the Junos OS.

Junos OS supports both client and server modes for NTP. A Junos device can act as an NTP server to provide time synchronization services to other devices.

CThe Junos OS can provide a primary time reference.

While Junos devices can operate as NTP servers, they typically rely on external, more accurate time sources (like stratum 1 or 2 servers) and are not generally considered primary time references themselves in the broader NTP hierarchy.

DThe Junos OS does not support the use of a boot server.

The concept of a 'boot server' is not directly related to standard NTP functionality in the context of time synchronization. NTP operates by synchronizing with existing time servers.

Concept tested: Junos NTP features and security

Source: https://www.juniper.net/documentation/us/en/software/junos/system-basics/topics/task/ntp-configuring-authentication.html

Topics

#NTP#MD5 authentication#Junos OS features

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