CLCOR Infrastructure And Design Practice Question
Which TWO of the following are common reasons for database replication failure 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
✓
Blocked database replication ports
NTP synchronization issues and TCP port connectivity (like 1515, 1502) between nodes are the most frequent causes of database replication failure.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Blocked database replication ports
Why this is correct
Replication requires specific TCP ports to be open.
- ✗
Incorrect IP address in host file
Why it's wrong here
Host file changes are not a cause; DNS mismatches might be, but host files are usually static.
- ✗
High CPU utilization on the publisher
Why it's wrong here
High CPU slows down performance, but doesn't cause replication states to fail.
- ✗
Missing TFTP files
Why it's wrong here
TFTP issues are independent of database replication.
- ✓
NTP drift between nodes
Why this is correct
Replication requires precise time sync.
About these practice questions
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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.