CLCOR Infrastructure And Design Practice Question
Which THREE of the following are necessary to ensure successful NTP deployment in a CUCM cluster?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure external Stratum 1 or 2 servers
The publisher node must point to external Stratum 1 or 2 servers, subscribers must point to the publisher (or external sources), and firewall ports (UDP 123) must be open.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use broadcast mode
Why it's wrong here
Unicast is the standard for CUCM.
- ✓
Configure external Stratum 1 or 2 servers
Why this is correct
Required for reliable time source.
- ✓
Open UDP 123 on firewalls
Why this is correct
NTP traffic uses UDP 123.
- ✗
Enable NTP on the local voice gateway
Why it's wrong here
Important, but not a requirement for the CUCM cluster itself.
- ✓
Consistent configuration across all nodes
Why this is correct
Prevents time divergence in the cluster.
About these practice questions
This CLCOR question is part of Courseiva's 263-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Cisco exam blueprint
This CLCOR practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CLCOR exam.